Add method in CastWebContentsView to return ContentView and ContentViewRendererView.

Bug: internal b/143071435
Test: tested on AndroidThings device
Change-Id: I4b93f9ed7c39dbfa1e669c285515234f2acc241d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1902075Reviewed-by: Simeon Anfinrud <sanfin@chromium.org>
Commit-Queue: Zhiheng(Vincent) Li <vincentli@google.com>
Auto-Submit: Zhiheng(Vincent) Li <vincentli@google.com>
Cr-Commit-Position: refs/heads/master@{#714835}

chromecast/browser/android/apk/src/org/chromium/chromecast/shell/CastWebContentsScopes.java

@@ -26,6 +26,8 @@ class CastWebContentsScopes {
         IBinder provideWindowToken();
     }
 
+    static final String VIEW_TAG_CONTENT_VIEW = "ContentView";
+
     public static Observer<WebContents> onLayoutActivity(
             Activity activity, FrameLayout layout, @ColorInt int backgroundColor) {
         layout.setBackgroundColor(backgroundColor);
@@ -77,6 +79,7 @@ class CastWebContentsScopes {
             layout.addView(contentView, matchParent);
             contentView.setFocusable(true);
             contentView.requestFocus();
+            contentView.setTag(VIEW_TAG_CONTENT_VIEW);
             contentViewRenderView.setCurrentWebContents(webContents);
             return () -> {
                 layout.setForeground(new ColorDrawable(backgroundColor));

chromecast/browser/android/apk/src/org/chromium/chromecast/shell/CastWebContentsView.java

@@ -12,6 +12,9 @@ import android.os.Bundle;
 import android.os.IBinder;
 import android.support.annotation.Nullable;
 import android.view.LayoutInflater;
+import android.view.MotionEvent;
+import android.view.View;
+import android.view.accessibility.AccessibilityNodeProvider;
 import android.widget.FrameLayout;
 
 import org.chromium.base.Log;
@@ -43,7 +46,8 @@ public class CastWebContentsView extends FrameLayout {
         FrameLayout.LayoutParams matchParent = new FrameLayout.LayoutParams(
                 FrameLayout.LayoutParams.MATCH_PARENT, FrameLayout.LayoutParams.MATCH_PARENT);
         addView(LayoutInflater.from(getContext())
-                        .inflate(R.layout.cast_web_contents_activity, null), matchParent);
+                        .inflate(R.layout.cast_web_contents_activity, null),
+                matchParent);
     }
 
     public void onStart(Bundle startArgumentsBundle) {
@@ -91,4 +95,40 @@ public class CastWebContentsView extends FrameLayout {
     private void sendIntentSync(Intent in) {
         CastWebContentsIntentUtils.getLocalBroadcastManager().sendBroadcastSync(in);
     }
+
+    @Override
+    public AccessibilityNodeProvider getAccessibilityNodeProvider() {
+        View contentView = getContentView();
+        if (contentView != null) {
+            return contentView.getAccessibilityNodeProvider();
+        } else {
+            Log.w(TAG, "Content view is null! Returns a null AccessibilityNodeProvider.");
+            return null;
+        }
+    }
+
+    @Override
+    public void setAccessibilityDelegate(AccessibilityDelegate delegate) {
+        View contentView = getContentView();
+        if (contentView != null) {
+            contentView.setAccessibilityDelegate(delegate);
+        } else {
+            Log.w(TAG, "Content view is null!");
+        }
+    }
+
+    @Override
+    public boolean onHoverEvent(MotionEvent event) {
+        View contentView = getContentView();
+        if (contentView != null) {
+            return contentView.onHoverEvent(event);
+        } else {
+            Log.w(TAG, "Content view is null!");
+            return false;
+        }
+    }
+
+    private View getContentView() {
+        return findViewWithTag(CastWebContentsScopes.VIEW_TAG_CONTENT_VIEW);
+    }
 }