Declare a new name for CompositingSurface completion callback.

content/browser/frame_host/render_widget_host_view_guest.cc

 // Copyright 2014 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 "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #include "content/browser/browser_plugin/browser_plugin_guest.h"
 #include "content/browser/frame_host/render_widget_host_view_guest.h"
@@ skipping 352 matching lines @@
   guest_params.anchor_rect.set_origin(
       guest_->GetScreenCoordinates(params.anchor_rect.origin()));
   guest_params.focus_rect.set_origin(
       guest_->GetScreenCoordinates(params.focus_rect.origin()));
   rwhv->SelectionBoundsChanged(guest_params);
 }
 
 void RenderWidgetHostViewGuest::CopyFromCompositingSurface(
     const gfx::Rect& src_subrect,
     const gfx::Size& dst_size,
-    const base::Callback<void(bool, const SkBitmap&)>& callback,
+    CopyFromCompositingSurfaceCallback& callback,
     const SkColorType color_type) {
   CHECK(guest_);
   guest_->CopyFromCompositingSurface(src_subrect, dst_size, callback);
 }
 
 void RenderWidgetHostViewGuest::SetBackgroundOpaque(bool opaque) {
   platform_view_->SetBackgroundOpaque(opaque);
 }
 
 bool RenderWidgetHostViewGuest::LockMouse() {
@@ skipping 220 matching lines @@
   }
 
   if (blink::WebInputEvent::isGestureEventType(event->type)) {
     host_->ForwardGestureEvent(
         *static_cast<const blink::WebGestureEvent*>(event));
     return;
   }
 }
 
 }  // namespace content