Implement DocuementHasImages

android_webview/renderer/aw_render_view_ext.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 ANDROID_WEBVIEW_RENDERER_AW_RENDER_VIEW_EXT_H_
+#define ANDROID_WEBVIEW_RENDERER_AW_RENDER_VIEW_EXT_H_
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "content/public/renderer/render_view_observer.h"
+
+namespace android_webview {
+
+// Render process side of AwRenderViewHostExt, this provides cross-process
+// implementation of miscellaneous WebView functions that we need to poke
+// WebKit directly to implement (and that aren't needed in the chrome app).
+class AwRenderViewExt : public content::RenderViewObserver {
+ public:
+  AwRenderViewExt(content::RenderView* render_view);
+  virtual ~AwRenderViewExt();
+
+ private:
+  // RenderView::Observer:
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
+
+  void OnDocumentHasImagesRequest(int id);
+
+  DISALLOW_COPY_AND_ASSIGN(AwRenderViewExt);
+};
+
+}  // namespace android_webview
+
+#endif  // ANDROID_WEBVIEW_RENDERER_AW_RENDER_VIEW_EXT_H_