weblayer: Make keyboard IME work

Use the ContentView as the WebContents container view
Also emulate focus changes like content shell.

Change-Id: I6edf3e7be920bcc2a385d0698b1bf949a496c91e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1790150
Commit-Queue: Bo <boliu@chromium.org>
Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Cr-Commit-Position: refs/heads/master@{#694886}

weblayer/browser/java/org/chromium/weblayer_private/BrowserControllerImpl.java

@@ -76,7 +76,9 @@ public final class BrowserControllerImpl extends IBrowserController.Stub {
 
         mNativeBrowserController = nativeCreateBrowserController(profile.getNativeProfile());
         mWebContents = nativeGetWebContents(mNativeBrowserController);
-        mWebContents.initialize("", ViewAndroidDelegate.createBasicDelegate(mContentViewRenderView),
+        mContentView = ContentView.createContentView(context, mWebContents);
+
+        mWebContents.initialize("", ViewAndroidDelegate.createBasicDelegate(mContentView),
                 new InternalAccessDelegateImpl(), mWindowAndroid,
                 WebContents.createDefaultInternalsHolder());
 
@@ -85,12 +87,12 @@ public final class BrowserControllerImpl extends IBrowserController.Stub {
                 new LinearLayout.LayoutParams(
                         LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT, 1f));
 
-        mContentView = ContentView.createContentView(context, mWebContents);
         mContentViewRenderView.addView(mContentView,
                 new LinearLayout.LayoutParams(
                         LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT, 1f));
 
         mWebContents.onShow();
+        mContentView.requestFocus();
     }
 
     long getNativeBrowserController() {

weblayer/shell/android/shell_apk/src/org/chromium/weblayer/shell/WebLayerShellActivity.java

@@ -36,6 +36,7 @@ public class WebLayerShellActivity extends FragmentActivity {
     private Profile mProfile;
     private BrowserController mBrowserController;
     private EditText mUrlView;
+    private View mMainView;
 
     public static class ShellFragment extends Fragment {
         private BrowserController mBrowserController;
@@ -61,6 +62,7 @@ public class WebLayerShellActivity extends FragmentActivity {
         LinearLayout mainView = new LinearLayout(this);
         int viewId = View.generateViewId();
         mainView.setId(viewId);
+        mMainView = mainView;
         setContentView(mainView);
 
         mUrlView = new EditText(this);
@@ -111,6 +113,7 @@ public class WebLayerShellActivity extends FragmentActivity {
 
     private void loadUrl(String url) {
         mBrowserController.getNavigationController().navigate(Uri.parse(sanitizeUrl(url)));
+        mUrlView.clearFocus();
     }
 
     /**