Part 1: Refactor Android WebView graphics code

android_webview/browser/hardware_renderer_proxy.h

+// 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.
+
+#ifndef ANDROID_WEBVIEW_BROWSER_HARDWARE_RENDERER_PROXY_H_
+#define ANDROID_WEBVIEW_BROWSER_HARDWARE_RENDERER_PROXY_H_
+#include "android_webview/browser/parent_compositor_draw_constraints.h"
+#include "base/memory/scoped_ptr.h"
+#include "cc/output/compositor_frame.h"
+#include "cc/resources/returned_resource.h"
+#include "ui/gfx/geometry/vector2d_f.h"
+
+namespace android_webview {
+
+class HardwareRendererProxy {

[boliu, 2014/10/23 16:40:05]

virtual destructor

+ public:
+  virtual gfx::Vector2d GetScrollOffset() = 0;

[boliu, 2014/10/23 16:40:05]

nit, can we add OnRT to the end of all these function calls, to make
distinguishing them easier, just by name

+  virtual scoped_ptr<cc::CompositorFrame> PassCompositorFrame() = 0;
+  // Returns true if the draw constraints are updated.
+  virtual bool SetParentCompositorDrawConstraints(
+      const ParentCompositorDrawConstraints& draw_constraints) = 0;
+  virtual void PostExternalDrawConstraintsToChildCompositor(
+      const ParentCompositorDrawConstraints& draw_constraints) = 0;
+  virtual void InsertReturnedResources(
+      const cc::ReturnedResourceArray& resources) = 0;
+  virtual void DidSkipCommitFrame() = 0;
+  virtual bool ForceCommit() const = 0;
+};
+
+}  // namespace android_webview
+
+#endif  // ANDROID_WEBVIEW_BROWSER_HARDWARE_RENDERER_PROXY_H_