[Android] Support unfocusable container views.

content/browser/android/content_view_core_impl.h

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_ANDROID_CONTENT_VIEW_CORE_IMPL_H_
 #define CONTENT_BROWSER_ANDROID_CONTENT_VIEW_CORE_IMPL_H_
 
 #include <vector>
 
 #include "base/android/jni_android.h"
@@ skipping 205 matching lines @@
                         int selection_start,
                         int selection_end,
                         int composition_start,
                         int composition_end,
                         bool show_ime_if_needed,
                         bool is_non_ime_change);
   void SetTitle(const base::string16& title);
   void OnBackgroundColorChanged(SkColor color);
 
   bool HasFocus();
+  bool IsFocusable();
   void OnGestureEventAck(const blink::WebGestureEvent& event,
                          InputEventAckState ack_result);
   bool FilterInputEvent(const blink::WebInputEvent& event);
   void OnSelectionChanged(const std::string& text);
   void OnSelectionEvent(SelectionEventType event,
                         const gfx::PointF& anchor_position);
   scoped_ptr<TouchHandleDrawable> CreatePopupTouchHandleDrawable();
 
   void StartContentIntent(const GURL& content_url);
 
@@ skipping 106 matching lines @@
       java_bridge_dispatcher_host_;
 
   DISALLOW_COPY_AND_ASSIGN(ContentViewCoreImpl);
 };
 
 bool RegisterContentViewCore(JNIEnv* env);
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_ANDROID_CONTENT_VIEW_CORE_IMPL_H_