[Touchless] Display progressbar on activity resume

This shows the progressbar that includes the current URL when the
activity is resumed.

Bug: 961404
Change-Id: I61bbc4ac02006c39b3e32d8615489bcc785719ab
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1617646Reviewed-by: Yaron Friedman <yfriedman@chromium.org>
Commit-Queue: Mehran Mahmoudi <mahmoudi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#660983}

chrome/android/touchless/java/src/org/chromium/chrome/browser/touchless/TouchlessUiCoordinatorImpl.java

@@ -14,6 +14,7 @@ import org.chromium.chrome.browser.ChromeActivity;
 import org.chromium.chrome.browser.lifecycle.Destroyable;
 import org.chromium.chrome.browser.lifecycle.InflationObserver;
 import org.chromium.chrome.browser.lifecycle.NativeInitObserver;
+import org.chromium.chrome.browser.lifecycle.PauseResumeWithNativeObserver;
 import org.chromium.chrome.browser.snackbar.SnackbarManager;
 import org.chromium.chrome.browser.touchless.dialog.TouchlessDialogPresenter;
 import org.chromium.chrome.browser.touchless.snackbar.BlackHoleSnackbarManager;
@@ -25,8 +26,9 @@ import org.chromium.ui.modaldialog.ModalDialogManager;
 import org.chromium.ui.modaldialog.ModalDialogManager.ModalDialogType;
 
 /** A coordinator for touchless UI. */
-public class TouchlessUiCoordinatorImpl
-        implements Destroyable, NativeInitObserver, InflationObserver, TouchlessUiCoordinator {
+public class TouchlessUiCoordinatorImpl implements Destroyable, NativeInitObserver,
+                                                   InflationObserver, PauseResumeWithNativeObserver,
+                                                   TouchlessUiCoordinator {
     private ChromeActivity mActivity;
 
     private TouchlessModelCoordinator mModelCoordinator;
@@ -75,6 +77,14 @@ public class TouchlessUiCoordinatorImpl
         mTouchlessZoomHelper = new TouchlessZoomHelper(mActivity.getActivityTabProvider());
     }
 
+    @Override
+    public void onResumeWithNative() {
+        mProgressBarCoordinator.onActivityResume();
+    }
+
+    @Override
+    public void onPauseWithNative() {}
+
     @Override
     public KeyEvent processKeyEvent(KeyEvent event) {
         if (mProgressBarCoordinator != null) mProgressBarCoordinator.onKeyEvent();

chrome/android/touchless/java/src/org/chromium/chrome/browser/touchless/ui/progressbar/ProgressBarCoordinator.java

@@ -28,6 +28,10 @@ public class ProgressBarCoordinator {
         mMediator = new ProgressBarMediator(model, activityTabProvider);
     }
 
+    public void onActivityResume() {
+        mMediator.onActivityResume();
+    }
+
     public void onKeyEvent() {
         mMediator.onKeyEvent();
     }

chrome/android/touchless/java/src/org/chromium/chrome/browser/touchless/ui/progressbar/ProgressBarMediator.java

@@ -32,6 +32,10 @@ public class ProgressBarMediator {
         mModel = model;
     }
 
+    void onActivityResume() {
+        if (mModel.get(ProgressBarProperties.IS_ENABLED)) show();
+    }
+
     void onKeyEvent() {
         mCanHideProgressBar = true;
         hide();