Support error handling for Surface readbacks

content/browser/renderer_host/render_widget_host_view_aura.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_aura.h"
 
 #include "base/auto_reset.h"
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/callback_helpers.h"
@@ skipping 930 matching lines @@
 
   if (touch_editing_client_) {
     touch_editing_client_->OnSelectionOrCursorChanged(selection_anchor_rect_,
         selection_focus_rect_);
   }
 }
 
 void RenderWidgetHostViewAura::CopyFromCompositingSurface(
     const gfx::Rect& src_subrect,
     const gfx::Size& dst_size,
-    CopyFromCompositingSurfaceCallback& callback,
+    ReadbackRequestCallback& callback,
     const SkColorType color_type) {
   delegated_frame_host_->CopyFromCompositingSurface(
       src_subrect, dst_size, callback, color_type);
 }
 
 void RenderWidgetHostViewAura::CopyFromCompositingSurfaceToVideoFrame(
       const gfx::Rect& src_subrect,
       const scoped_refptr<media::VideoFrame>& target,
       const base::Callback<void(bool)>& callback) {
   delegated_frame_host_->CopyFromCompositingSurfaceToVideoFrame(
@@ skipping 283 matching lines @@
   CopyFromCompositingSurface(
       disambiguation_target_rect_,
       zoomed_size,
       base::Bind(&RenderWidgetHostViewAura::DisambiguationPopupRendered,
           base::internal::SupportsWeakPtrBase::StaticAsWeakPtr
               <RenderWidgetHostViewAura>(this)),
       kN32_SkColorType);
 }
 
 void RenderWidgetHostViewAura::DisambiguationPopupRendered(
-    bool success,
-    const SkBitmap& result) {
-  if (!success || disambiguation_scroll_offset_ != last_scroll_offset_)
+    const SkBitmap& result,
+    const ReadbackResponse& response) {
+  if ((response != READBACK_SUCCESS) ||
+      disambiguation_scroll_offset_ != last_scroll_offset_)
     return;
 
   // Use RenderViewHostDelegate to get to the WebContentsViewAura, which will
   // actually show the delegate.
   RenderViewHostDelegate* delegate = NULL;
   if (host_->IsRenderView())
     delegate = RenderViewHost::From(host_)->GetDelegate();
   RenderViewHostDelegateView* delegate_view = NULL;
   if (delegate)
     delegate_view = delegate->GetDelegateView();
@@ skipping 1272 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // RenderWidgetHostViewBase, public:
 
 // static
 void RenderWidgetHostViewBase::GetDefaultScreenInfo(WebScreenInfo* results) {
   GetScreenInfoForWindow(results, NULL);
 }
 
 }  // namespace content