Define frame subscription interface and implementation on Mac

content/browser/renderer_host/render_widget_host_view_base.cc

 // Copyright (c) 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.
 
 #include "content/browser/renderer_host/render_widget_host_view_base.h"
 
 #include "base/logging.h"
 #include "content/browser/accessibility/browser_accessibility_manager.h"
 #include "content/browser/renderer_host/basic_mouse_wheel_smooth_scroll_gesture.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
@@ skipping 447 matching lines @@
     bool scroll_down, int pixels_to_scroll, int mouse_event_x,
     int mouse_event_y) {
   return new BasicMouseWheelSmoothScrollGesture(scroll_down, pixels_to_scroll,
                                                 mouse_event_x, mouse_event_y);
 }
 
 void RenderWidgetHostViewBase::ProcessAckedTouchEvent(
     const WebKit::WebTouchEvent& touch, InputEventAckState ack_result) {
 }
 
+bool RenderWidgetHostViewBase::CanSubscribeFrame() const {
+  NOTIMPLEMENTED();
+  return false;
+}
+
+void RenderWidgetHostViewBase::BeginFrameSubscription(
+    RenderWidgetHostViewFrameSubscriber* subscriber) {
+  NOTIMPLEMENTED();
+}
+
+void RenderWidgetHostViewBase::EndFrameSubscription() {
+  NOTIMPLEMENTED();
+}
+
 }  // namespace content