[android_webview] Correctly handle ContextWrapper in AwContents.

content/public/android/java/src/org/chromium/content/browser/ContentVideoView.java

Index: content/public/android/java/src/org/chromium/content/browser/ContentVideoView.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/ContentVideoView.java b/content/public/android/java/src/org/chromium/content/browser/ContentVideoView.java
index 40439888c787ba13f76cd1b42140cde337c1b904..b2d6e0a4f987f2f405e9ad230b7967f7afaf6fe7 100644
--- a/content/public/android/java/src/org/chromium/content/browser/ContentVideoView.java
+++ b/content/public/android/java/src/org/chromium/content/browser/ContentVideoView.java
@@ -4,10 +4,8 @@
 
 package org.chromium.content.browser;
 
-import android.app.Activity;
 import android.app.AlertDialog;
 import android.content.Context;
-import android.content.ContextWrapper;
 import android.content.DialogInterface;
 import android.graphics.Point;
 import android.provider.Settings;
@@ -231,7 +229,7 @@ public class ContentVideoView extends FrameLayout
 
         mCurrentState = STATE_ERROR;
 
-        if (!isActivityContext(getContext())) {
+        if (ContentViewCore.activityFromContext(getContext()) == null) {
             Log.w(TAG, "Unable to show alert dialog because it requires an activity context");
             return;
         }
@@ -424,16 +422,6 @@ public class ContentVideoView extends FrameLayout
         return videoView;
     }
 
-    private static boolean isActivityContext(Context context) {
-        // Only retrieve the base context if the supplied context is a ContextWrapper but not
-        // an Activity, given that Activity is already a subclass of ContextWrapper.
-        if (context instanceof ContextWrapper && !(context instanceof Activity)) {
-            context = ((ContextWrapper) context).getBaseContext();
-            return isActivityContext(context);
-        }
-        return context instanceof Activity;
-    }
-
     public void removeSurfaceView() {
         removeView(mVideoSurfaceView);
         removeView(mProgressView);