[Android WebView] Migrate the rendering code to a separate set of classes.

android_webview/renderer/view_renderer.cc

+// Copyright (c) 2013 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 "android_webview/renderer/view_renderer.h"
+
+#include "android_webview/common/render_view_messages.h"
+#include "android_webview/common/renderer_picture_map.h"
+#include "content/public/renderer/render_view.h"
+#include "skia/ext/refptr.h"
+
+namespace android_webview {
+
+// static
+void ViewRenderer::RenderViewCreated(content::RenderView* render_view) {
+  new ViewRenderer(render_view);  // |render_view| takes ownership.
+}
+
+ViewRenderer::ViewRenderer(content::RenderView* render_view)
+    : content::RenderViewObserver(render_view),
+      // TODO(leandrogracia): default to false when SW mode uses Ubercompositor.
+      // Until then we need picture updates enabled for SW mode invalidation.
+      // http://crbug.com/170086.
+      capture_picture_enabled_(true) {
+}
+
+ViewRenderer::~ViewRenderer() {
+  RendererPictureMap::GetInstance()->ClearRendererPicture(routing_id());
+}
+
+bool ViewRenderer::OnMessageReceived(const IPC::Message& message) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(ViewRenderer, message)
+    IPC_MESSAGE_HANDLER(AwViewMsg_EnableCapturePictureCallback,
+                        OnEnableCapturePictureCallback)
+    IPC_MESSAGE_HANDLER(AwViewMsg_CapturePictureSync,
+                        OnCapturePictureSync)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  return handled;
+}
+
+void ViewRenderer::DidCommitCompositorFrame() {
+  if (!capture_picture_enabled_)
+    return;
+
+  skia::RefPtr<SkPicture> picture = render_view()->CapturePicture();
+  RendererPictureMap::GetInstance()->SetRendererPicture(routing_id(), picture);
+  Send(new AwViewHostMsg_PictureUpdated(routing_id()));
+}
+
+void ViewRenderer::OnEnableCapturePictureCallback(bool enable) {
+  capture_picture_enabled_ = enable;
+}
+
+void ViewRenderer::OnCapturePictureSync() {
+  RendererPictureMap::GetInstance()->SetRendererPicture(
+      routing_id(), render_view()->CapturePicture());
+}
+
+}  // namespace android_webview