Support error handling for Surface readbacks

content/public/browser/android/content_view_core.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_BROWSER_ANDROID_CONTENT_VIEW_CORE_H_
 #define CONTENT_PUBLIC_BROWSER_ANDROID_CONTENT_VIEW_CORE_H_
 
 #include <jni.h>
 
 #include "base/android/scoped_java_ref.h"
 #include "base/callback.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/navigation_controller.h"
+#include "content/public/browser/readback_types.h"
 #include "third_party/skia/include/core/SkImageInfo.h"
 #include "ui/gfx/rect.h"
 
 class SkBitmap;
 
 namespace cc {
 class Layer;
 }
 
 namespace gfx {
@@ skipping 26 matching lines @@
   virtual scoped_refptr<cc::Layer> GetLayer() const = 0;
   virtual void ShowPastePopup(int x, int y) = 0;
 
   // Request a scaled content readback. The result is passed through the
   // callback. The boolean parameter indicates whether the readback was a
   // success or not. The content is passed through the SkBitmap parameter.
   virtual void GetScaledContentBitmap(
       float scale,
       SkColorType color_type,
       gfx::Rect src_rect,
-      const base::Callback<void(bool, const SkBitmap&)>& result_callback) = 0;
+      ReadbackRequestCallback& result_callback) = 0;
   virtual float GetDpiScale() const = 0;
   virtual void PauseOrResumeGeolocation(bool should_pause) = 0;
 
   // Observer callback for frame metadata updates.
   typedef base::Callback<void(
       const gfx::SizeF& content_size,
       const gfx::Vector2dF& scroll_offset,
       float page_scale_factor)> UpdateFrameInfoCallback;
 
   // Text surrounding selection.
   virtual void RequestTextSurroundingSelection(
       int max_length,
       const base::Callback<void(const base::string16& content,
                                 int start_offset,
                                 int end_offset)>& callback) = 0;
 
  protected:
   virtual ~ContentViewCore() {};
 };
 
 };  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_ANDROID_CONTENT_VIEW_CORE_H_