Dont cache activity for external navigation handling

This removes the cached activity copies from InterceptNavigationHandler
and ExternalNavigationHandler.

- Uses application context when it doesn't make any difference(For
  package manager related calls.)
- Tries to get the activity through the tab and if not fail gracefully
  either by early return or using application context for launching new
  activity.

BUG=546736

Review URL: https://codereview.chromium.org/1636573004

Cr-Commit-Position: refs/heads/master@{#371853}

chrome/android/java/src/org/chromium/chrome/browser/compositor/bottombar/OverlayPanelContent.java

@@ -115,7 +115,7 @@ public class OverlayPanelContent {
     // which would also handle functionality like long-press-to-paste.
     private class InterceptNavigationDelegateImpl implements InterceptNavigationDelegate {
         final ExternalNavigationHandler mExternalNavHandler = new ExternalNavigationHandler(
-                mActivity);
+                mActivity.getActivityTab());
         @Override
         public boolean shouldIgnoreNavigation(NavigationParams navigationParams) {
             // TODO(mdjones): Rather than passing the two navigation params, instead consider

chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabDelegateFactory.java

@@ -4,13 +4,14 @@
 
 package org.chromium.chrome.browser.customtabs;
 
+import android.app.Activity;
+import android.content.Context;
 import android.content.Intent;
 import android.content.pm.ResolveInfo;
 import android.os.TransactionTooLargeException;
 
 import org.chromium.base.Log;
 import org.chromium.base.VisibleForTesting;
-import org.chromium.chrome.browser.ChromeActivity;
 import org.chromium.chrome.browser.banners.AppBannerManager;
 import org.chromium.chrome.browser.contextmenu.ChromeContextMenuPopulator;
 import org.chromium.chrome.browser.contextmenu.ContextMenuPopulator;
@@ -39,8 +40,8 @@ public class CustomTabDelegateFactory extends TabDelegateFactory {
         /**
          * Constructs a new instance of {@link CustomTabNavigationDelegate}.
          */
-        public CustomTabNavigationDelegate(ChromeActivity activity, String clientPackageName) {
-            super(activity);
+        public CustomTabNavigationDelegate(Tab tab, String clientPackageName) {
+            super(tab);
             mClientPackageName = clientPackageName;
         }
 
@@ -57,17 +58,21 @@ public class CustomTabDelegateFactory extends TabDelegateFactory {
             try {
                 // For a URL chrome can handle and there is no default set, handle it ourselves.
                 if (!hasDefaultHandler) {
-                    if (isPackageSpecializedHandler(getActivity(), mClientPackageName, intent)) {
+                    if (isPackageSpecializedHandler(
+                            mApplicationContext, mClientPackageName, intent)) {
                         intent.setPackage(mClientPackageName);
                     } else if (!isExternalProtocol) {
                         return false;
                     }
                 }
                 // If android fails to find a handler, handle it ourselves.
-                if (!getActivity().startActivityIfNeeded(intent, -1)) return false;
-
-                mHasActivityStarted = true;
-                return true;
+                Context context = getAvailableContext();
+                if (context instanceof Activity
+                        && ((Activity) context).startActivityIfNeeded(intent, -1)) {
+                    mHasActivityStarted = true;
+                    return true;
+                }
+                return false;
             } catch (RuntimeException e) {
                 logTransactionTooLargeOrRethrow(e, intent);
                 return false;
@@ -81,9 +86,10 @@ public class CustomTabDelegateFactory extends TabDelegateFactory {
          */
         private boolean hasDefaultHandler(Intent intent) {
             try {
-                ResolveInfo info = getActivity().getPackageManager().resolveActivity(intent, 0);
+                ResolveInfo info =
+                        mApplicationContext.getPackageManager().resolveActivity(intent, 0);
                 if (info != null) {
-                    final String chromePackage = getActivity().getPackageName();
+                    final String chromePackage = mApplicationContext.getPackageName();
                     // If a default handler is found and it is not chrome itself, fire the intent.
                     if (info.match != 0 && !chromePackage.equals(info.activityInfo.packageName)) {
                         return true;
@@ -141,11 +147,10 @@ public class CustomTabDelegateFactory extends TabDelegateFactory {
     }
 
     @Override
-    public InterceptNavigationDelegateImpl createInterceptNavigationDelegate(Tab tab,
-            ChromeActivity activity) {
-        mNavigationDelegate = new CustomTabNavigationDelegate(activity, tab.getAppAssociatedWith());
+    public InterceptNavigationDelegateImpl createInterceptNavigationDelegate(Tab tab) {
+        mNavigationDelegate = new CustomTabNavigationDelegate(tab, tab.getAppAssociatedWith());
         mNavigationHandler = new ExternalNavigationHandler(mNavigationDelegate);
-        return new InterceptNavigationDelegateImpl(mNavigationHandler, activity, tab);
+        return new InterceptNavigationDelegateImpl(mNavigationHandler, tab);
     }
 
     @Override

chrome/android/java/src/org/chromium/chrome/browser/externalnav/ExternalNavigationDelegateImpl.java

@@ -41,6 +41,7 @@ import org.chromium.chrome.browser.util.UrlUtilities;
 import org.chromium.content_public.browser.LoadUrlParams;
 import org.chromium.content_public.common.Referrer;
 import org.chromium.ui.base.PageTransition;
+import org.chromium.ui.base.WindowAndroid;
 import org.chromium.ui.base.WindowAndroid.PermissionCallback;
 
 import java.util.List;
@@ -53,17 +54,28 @@ public class ExternalNavigationDelegateImpl implements ExternalNavigationDelegat
     private static final String PDF_VIEWER = "com.google.android.apps.docs";
     private static final String PDF_MIME = "application/pdf";
     private static final String PDF_SUFFIX = ".pdf";
-    private final ChromeActivity mActivity;
 
-    public ExternalNavigationDelegateImpl(ChromeActivity activity) {
-        mActivity = activity;
+    protected final Context mApplicationContext;
+    private final Tab mTab;
+
+    public ExternalNavigationDelegateImpl(Tab tab) {
+        mTab = tab;
+        mApplicationContext = tab.getContentViewCore().getContext().getApplicationContext();
     }
 
     /**
-     * @return The activity that this delegate is associated with.
+     * Get a {@link Context} linked to this delegate with preference to {@link Activity}.
+     * The tab this delegate associates with can swap the {@link Activity} it is hosted in and
+     * during the swap, there might not be an available {@link Activity}.
+     * @return The activity {@link Context} if it can be reached.
+     *         Application {@link Context} if not.
      */
-    protected final Activity getActivity() {
-        return mActivity;
+    protected final Context getAvailableContext() {
+        if (mTab.getWindowAndroid() == null) return mApplicationContext;
+        Context activityContext = WindowAndroid.activityFromContext(
+                mTab.getWindowAndroid().getContext().get());
+        if (activityContext == null) return mApplicationContext;
+        return activityContext;
     }
 
     /**
@@ -189,17 +201,17 @@ public class ExternalNavigationDelegateImpl implements ExternalNavigationDelegat
 
     @Override
     public List<ComponentName> queryIntentActivities(Intent intent) {
-        return IntentUtils.getIntentHandlers(mActivity, intent);
+        return IntentUtils.getIntentHandlers(mApplicationContext, intent);
     }
 
     @Override
     public boolean willChromeHandleIntent(Intent intent) {
-        return willChromeHandleIntent(mActivity, intent, false);
+        return willChromeHandleIntent(mApplicationContext, intent, false);
     }
 
     @Override
     public boolean isSpecializedHandlerAvailable(Intent intent) {
-        return isPackageSpecializedHandler(mActivity, null, intent);
+        return isPackageSpecializedHandler(mApplicationContext, null, intent);
     }
 
     /**
@@ -242,14 +254,16 @@ public class ExternalNavigationDelegateImpl implements ExternalNavigationDelegat
 
     @Override
     public String getPackageName() {
-        return mActivity.getPackageName();
+        return mApplicationContext.getPackageName();
     }
 
     @Override
     public void startActivity(Intent intent) {
         try {
-            forcePdfViewerAsIntentHandlerIfNeeded(mActivity, intent);
-            mActivity.startActivity(intent);
+            forcePdfViewerAsIntentHandlerIfNeeded(mApplicationContext, intent);
+            Context context = getAvailableContext();
+            if (!(context instanceof Activity)) intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+            context.startActivity(intent);
         } catch (RuntimeException e) {
             logTransactionTooLargeOrRethrow(e, intent);
         }
@@ -258,8 +272,13 @@ public class ExternalNavigationDelegateImpl implements ExternalNavigationDelegat
     @Override
     public boolean startActivityIfNeeded(Intent intent) {
         try {
-            forcePdfViewerAsIntentHandlerIfNeeded(mActivity, intent);
-            return mActivity.startActivityIfNeeded(intent, -1);
+            forcePdfViewerAsIntentHandlerIfNeeded(mApplicationContext, intent);
+            Context context = getAvailableContext();
+            if (context instanceof Activity) {
+                return ((Activity) context).startActivityIfNeeded(intent, -1);
+            } else {
+                return false;
+            }
         } catch (RuntimeException e) {
             logTransactionTooLargeOrRethrow(e, intent);
             return false;
@@ -269,7 +288,11 @@ public class ExternalNavigationDelegateImpl implements ExternalNavigationDelegat
     @Override
     public void startIncognitoIntent(final Intent intent, final String referrerUrl,
             final String fallbackUrl, final Tab tab, final boolean needsToCloseTab) {
-        new AlertDialog.Builder(mActivity, R.style.AlertDialogTheme)
+        Context context = tab.getWindowAndroid().getContext().get();
+        if (!(context instanceof Activity)) return;
+
+        Activity activity = (Activity) context;
+        new AlertDialog.Builder(activity, R.style.AlertDialogTheme)
             .setTitle(R.string.external_app_leave_incognito_warning_title)
             .setMessage(R.string.external_app_leave_incognito_warning)
             .setPositiveButton(R.string.ok, new OnClickListener() {
@@ -304,8 +327,7 @@ public class ExternalNavigationDelegateImpl implements ExternalNavigationDelegat
 
         // If the url points inside of Chromium's data directory, no permissions are necessary.
         // This is required to prevent permission prompt when uses wants to access offline pages.
-        if (url.startsWith("file://" + PathUtils.getDataDirectory(
-                mActivity.getApplicationContext()))) {
+        if (url.startsWith("file://" + PathUtils.getDataDirectory(mApplicationContext))) {
             return false;
         }
 
@@ -359,7 +381,7 @@ public class ExternalNavigationDelegateImpl implements ExternalNavigationDelegat
             intent.addCategory(Intent.CATEGORY_BROWSABLE);
             intent.setClassName(getPackageName(), ChromeLauncherActivity.class.getName());
             intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
-            IntentHandler.addTrustedIntentExtras(intent, mActivity);
+            IntentHandler.addTrustedIntentExtras(intent, mApplicationContext);
             startActivity(intent);
 
             if (needsToCloseTab) closeTab(tab);
@@ -406,13 +428,13 @@ public class ExternalNavigationDelegateImpl implements ExternalNavigationDelegat
 
     @Override
     public boolean isDocumentMode() {
-        return FeatureUtilities.isDocumentMode(mActivity);
+        return FeatureUtilities.isDocumentMode(mApplicationContext);
     }
 
     @Override
     public String getDefaultSmsPackageName() {
         if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) return null;
-        return Telephony.Sms.getDefaultSmsPackage(mActivity);
+        return Telephony.Sms.getDefaultSmsPackage(mApplicationContext);
     }
 
     private static void logTransactionTooLargeOrRethrow(RuntimeException e, Intent intent) {
@@ -425,6 +447,9 @@ public class ExternalNavigationDelegateImpl implements ExternalNavigationDelegat
     }
 
     private void closeTab(Tab tab) {
-        mActivity.getTabModelSelector().closeTab(tab);
+        Context context = tab.getWindowAndroid().getContext().get();
+        if (context instanceof ChromeActivity) {
+            ((ChromeActivity) context).getTabModelSelector().closeTab(tab);
+        }
     }
 }

chrome/android/java/src/org/chromium/chrome/browser/externalnav/ExternalNavigationHandler.java

@@ -17,10 +17,10 @@ import org.chromium.base.CommandLine;
 import org.chromium.base.Log;
 import org.chromium.base.VisibleForTesting;
 import org.chromium.base.metrics.RecordHistogram;
-import org.chromium.chrome.browser.ChromeActivity;
 import org.chromium.chrome.browser.ChromeSwitches;
 import org.chromium.chrome.browser.IntentHandler;
 import org.chromium.chrome.browser.UrlConstants;
+import org.chromium.chrome.browser.tab.Tab;
 import org.chromium.chrome.browser.util.IntentUtils;
 import org.chromium.chrome.browser.util.UrlUtilities;
 import org.chromium.ui.base.PageTransition;
@@ -65,10 +65,10 @@ public class ExternalNavigationHandler {
     /**
      * A constructor for UrlHandler.
      *
-     * @param activity The activity to launch an external intent from.
+     * @param tab The tab that initiated the external intent.
      */
-    public ExternalNavigationHandler(ChromeActivity activity) {
-        this(new ExternalNavigationDelegateImpl(activity));
+    public ExternalNavigationHandler(Tab tab) {
+        this(new ExternalNavigationDelegateImpl(tab));
     }
 
     /**

chrome/android/java/src/org/chromium/chrome/browser/tab/InterceptNavigationDelegateImpl.java

@@ -6,7 +6,6 @@ package org.chromium.chrome.browser.tab;
 
 import org.chromium.base.VisibleForTesting;
 import org.chromium.chrome.R;
-import org.chromium.chrome.browser.ChromeActivity;
 import org.chromium.chrome.browser.ChromeApplication;
 import org.chromium.chrome.browser.datausage.DataUseTabUIManager;
 import org.chromium.chrome.browser.externalnav.ExternalNavigationHandler;
@@ -25,7 +24,6 @@ import org.chromium.content_public.common.ConsoleMessageLevel;
  * tracking has ended.
  */
 public class InterceptNavigationDelegateImpl implements InterceptNavigationDelegate {
-    private final ChromeActivity mActivity;
     private final Tab mTab;
     private final ExternalNavigationHandler mExternalNavHandler;
     private final AuthenticatorNavigationInterceptor mAuthenticatorHelper;
@@ -41,17 +39,15 @@ public class InterceptNavigationDelegateImpl implements InterceptNavigationDeleg
     /**
      * Default constructor of {@link InterceptNavigationDelegateImpl}.
      */
-    public InterceptNavigationDelegateImpl(ChromeActivity activity, Tab tab) {
-        this(new ExternalNavigationHandler(activity), activity, tab);
+    public InterceptNavigationDelegateImpl(Tab tab) {
+        this(new ExternalNavigationHandler(tab), tab);
     }
 
     /**
      * Constructs a new instance of {@link InterceptNavigationDelegateImpl} with the given
      * {@link ExternalNavigationHandler}.
      */
-    public InterceptNavigationDelegateImpl(ExternalNavigationHandler externalNavHandler,
-            ChromeActivity activity, Tab tab) {
-        mActivity = activity;
+    public InterceptNavigationDelegateImpl(ExternalNavigationHandler externalNavHandler, Tab tab) {
         mTab = tab;
         mExternalNavHandler = externalNavHandler;
         mAuthenticatorHelper = ((ChromeApplication) mTab.getApplicationContext())
@@ -88,7 +84,7 @@ public class InterceptNavigationDelegateImpl implements InterceptNavigationDeleg
         tabRedirectHandler.updateNewUrlLoading(navigationParams.pageTransitionType,
                 navigationParams.isRedirect,
                 navigationParams.hasUserGesture || navigationParams.hasUserGestureCarryover,
-                mActivity.getLastUserInteractionTime(), getLastCommittedEntryIndex());
+                mTab.getActivity().getLastUserInteractionTime(), getLastCommittedEntryIndex());
         boolean shouldCloseTab = shouldCloseContentsOnOverrideUrlLoadingAndLaunchIntent();
         boolean isInitialTabLaunchInBackground =
                 mTab.getLaunchType() == TabLaunchType.FROM_LONGPRESS_BACKGROUND && shouldCloseTab;
@@ -131,7 +127,7 @@ public class InterceptNavigationDelegateImpl implements InterceptNavigationDeleg
                     logBlockedNavigationToDevToolsConsole(url);
                     return true;
                 }
-                return DataUseTabUIManager.shouldOverrideUrlLoading(mActivity, mTab, url,
+                return DataUseTabUIManager.shouldOverrideUrlLoading(mTab.getActivity(), mTab, url,
                         navigationParams.pageTransitionType, navigationParams.referrer);
         }
     }
@@ -209,9 +205,9 @@ public class InterceptNavigationDelegateImpl implements InterceptNavigationDeleg
                 // Moving task back before closing the tab allows back button to function better
                 // when Chrome was an intermediate link redirector between two apps.
                 // crbug.com/487938.
-                mActivity.moveTaskToBack(true);
+                mTab.getActivity().moveTaskToBack(true);
             }
-            mActivity.getTabModelSelector().closeTab(mTab);
+            mTab.getTabModelSelector().closeTab(mTab);
         } else if (mTab.getTabRedirectHandler().isOnNavigation()) {
             int lastCommittedEntryIndexBeforeNavigation = mTab.getTabRedirectHandler()
                     .getLastCommittedEntryIndexBeforeStartingNavigation();

chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java

@@ -1609,7 +1609,7 @@ public final class Tab implements ViewGroup.OnHierarchyChangeListener,
             cvc.setDownloadDelegate(mDownloadDelegate);
 
             setInterceptNavigationDelegate(mDelegateFactory.createInterceptNavigationDelegate(
-                    this, getActivity()));
+                    this));
 
             if (mGestureStateListener == null) {
                 mGestureStateListener = createGestureStateListener();

chrome/android/java/src/org/chromium/chrome/browser/tab/TabDelegateFactory.java

@@ -4,7 +4,6 @@
 
 package org.chromium.chrome.browser.tab;
 
-import org.chromium.chrome.browser.ChromeActivity;
 import org.chromium.chrome.browser.banners.AppBannerManager;
 import org.chromium.chrome.browser.contextmenu.ChromeContextMenuPopulator;
 import org.chromium.chrome.browser.contextmenu.ContextMenuPopulator;
@@ -27,12 +26,10 @@ public class TabDelegateFactory {
     /**
      * Creates the {@link InterceptNavigationDelegate} the tab will be initialized with.
      * @param tab The associated {@link Tab}.
-     * @param activity The {@link ChromeActivity} that the tab belongs to.
      * @return The {@link InterceptNavigationDelegate} to be used for this tab.
      */
-    public InterceptNavigationDelegateImpl createInterceptNavigationDelegate(
-            Tab tab, ChromeActivity activity) {
-        return new InterceptNavigationDelegateImpl(activity, tab);
+    public InterceptNavigationDelegateImpl createInterceptNavigationDelegate(Tab tab) {
+        return new InterceptNavigationDelegateImpl(tab);
     }
 
     /**

chrome/android/javatests/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchManagerTest.java

@@ -2000,7 +2000,7 @@ public class ContextualSearchManagerTest extends ChromeActivityTestCaseBase<Chro
     @Restriction(RESTRICTION_TYPE_NON_LOW_END_DEVICE)
     public void testExternalNavigationWithUserGesture() {
         final ExternalNavigationHandler externalNavHandler =
-                new ExternalNavigationHandler(getActivity());
+                new ExternalNavigationHandler(getActivity().getActivityTab());
         final NavigationParams navigationParams = new NavigationParams(
                 "intent://test/#Intent;scheme=test;package=com.chrome.test;end", "",
                 false /* isPost */, true /* hasUserGesture */, PageTransition.LINK,
@@ -2026,7 +2026,7 @@ public class ContextualSearchManagerTest extends ChromeActivityTestCaseBase<Chro
     @Restriction(RESTRICTION_TYPE_NON_LOW_END_DEVICE)
     public void testRedirectedExternalNavigationWithUserGesture() {
         final ExternalNavigationHandler externalNavHandler =
-                new ExternalNavigationHandler(getActivity());
+                new ExternalNavigationHandler(getActivity().getActivityTab());
 
         final NavigationParams initialNavigationParams = new NavigationParams("http://test.com", "",
                 false /* isPost */, true /* hasUserGesture */, PageTransition.LINK,
@@ -2060,7 +2060,7 @@ public class ContextualSearchManagerTest extends ChromeActivityTestCaseBase<Chro
     @Restriction(RESTRICTION_TYPE_NON_LOW_END_DEVICE)
     public void testExternalNavigationWithoutUserGesture() {
         final ExternalNavigationHandler externalNavHandler =
-                new ExternalNavigationHandler(getActivity());
+                new ExternalNavigationHandler(getActivity().getActivityTab());
         final NavigationParams navigationParams = new NavigationParams(
                 "intent://test/#Intent;scheme=test;package=com.chrome.test;end", "",
                 false /* isPost */, false /* hasUserGesture */, PageTransition.LINK,

chrome/android/javatests/src/org/chromium/chrome/browser/tab/InterceptNavigationDelegateTest.java

@@ -46,7 +46,7 @@ public class InterceptNavigationDelegateTest extends ChromeActivityTestCaseBase<
 
     class TestInterceptNavigationDelegate extends InterceptNavigationDelegateImpl {
         TestInterceptNavigationDelegate() {
-            super(mActivity, mActivity.getActivityTab());
+            super(mActivity.getActivityTab());
         }
 
         @Override