Implemented GetWindowSnapshot on RenderViewImpl

chrome/browser/ui/window_snapshot/window_snapshot_aura.h

Index: chrome/browser/ui/window_snapshot/window_snapshot_aura.h
diff --git a/chrome/browser/ui/window_snapshot/window_snapshot_aura.h b/chrome/browser/ui/window_snapshot/window_snapshot_aura.h
new file mode 100644
index 0000000000000000000000000000000000000000..9b967b3335c2232525fc7cff6a8dd147b1bd8bba
--- /dev/null
+++ b/chrome/browser/ui/window_snapshot/window_snapshot_aura.h
@@ -0,0 +1,30 @@
+// 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 CHROME_BROWSER_UI_WINDOW_SNAPSHOT_WINDOW_SNAPSHOT_AURA_H_
+#define CHROME_BROWSER_UI_WINDOW_SNAPSHOT_WINDOW_SNAPSHOT_AURA_H_
+
+#include <vector>
+
+#include "ui/aura/window.h"
+
+namespace gfx {
+class Rect;
+}
+
+namespace chrome {
+
+// Grabs a snapshot of the aura window from the compositor backbuffer. This
+// differs from the behavior of ui:GrabWindowSnapshot in that the image returned
+// may differ from the one presented to the screen. As such, this function is
+// not appropriate for rendering validation.
+// Returns true if the operation is successful (ie. permitted).
+bool GrabAuraCompositorSnapshot(
+    aura::Window* window,
+    std::vector<unsigned char>* png_representation,
+    const gfx::Rect& snapshot_bounds);
+
+}  // namespace chrome
+
+#endif  // CHROME_BROWSER_UI_WINDOW_SNAPSHOT_WINDOW_SNAPSHOT_AURA_H_