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

android_webview/browser/renderer_host/view_renderer_host.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/browser/renderer_host/view_renderer_host.h"
+
+#include "android_webview/browser/scoped_allow_wait_for_legacy_web_view_api.h"
+#include "android_webview/common/render_view_messages.h"
+#include "android_webview/common/renderer_picture_map.h"
+#include "content/public/browser/render_process_host.h"
+#include "content/public/browser/render_view_host.h"
+#include "content/public/browser/web_contents.h"
+
+namespace android_webview {
+
+ViewRendererHost::ViewRendererHost(content::WebContents* contents,
+                                   Client* client)
+    : content::WebContentsObserver(contents),
+      client_(client) {
+}
+
+ViewRendererHost::~ViewRendererHost() {
+}
+
+void ViewRendererHost::CapturePictureSync() {
+  if (!IsRenderViewReady())
+    return;
+
+  ScopedAllowWaitForLegacyWebViewApi wait;
+  Send(new AwViewMsg_CapturePictureSync(web_contents()->GetRoutingID()));
+}
+
+void ViewRendererHost::EnableCapturePictureCallback(bool enabled) {
+  Send(new AwViewMsg_EnableCapturePictureCallback(
+      web_contents()->GetRoutingID(), enabled));
+}
+
+void ViewRendererHost::OnPictureUpdated() {
+  if (client_) {
+    client_->OnPictureUpdated(web_contents()->GetRenderProcessHost()->GetID(),
+        routing_id());
+  }
+}
+
+void ViewRendererHost::RenderViewGone(base::TerminationStatus status) {
+  DCHECK(CalledOnValidThread());
+  RendererPictureMap::GetInstance()->ClearRendererPicture(
+      web_contents()->GetRoutingID());
+}
+
+bool ViewRendererHost::OnMessageReceived(const IPC::Message& message) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(ViewRendererHost, message)
+    IPC_MESSAGE_HANDLER(AwViewHostMsg_PictureUpdated,
+                        OnPictureUpdated)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+
+  return handled ? true : WebContentsObserver::OnMessageReceived(message);
+}
+
+bool ViewRendererHost::IsRenderViewReady() const {
+  return web_contents()->GetRenderProcessHost()->HasConnection() &&
+      web_contents()->GetRenderViewHost() &&
+      web_contents()->GetRenderViewHost()->IsRenderViewLive();
+}
+
+}  // namespace android_webview