Introduce new async IPC message to get file icons

chrome/browser/renderer_host/render_view_host.h

Index: chrome/browser/renderer_host/render_view_host.h
===================================================================
--- chrome/browser/renderer_host/render_view_host.h	(revision 46794)
+++ chrome/browser/renderer_host/render_view_host.h	(working copy)
@@ -9,7 +9,9 @@
 #include <vector>
 
 #include "base/scoped_ptr.h"
+#include "chrome/browser/cancelable_request.h"
 #include "chrome/browser/find_bar_controller.h"
+#include "chrome/browser/icon_manager.h"
 #include "chrome/browser/renderer_host/render_widget_host.h"
 #include "chrome/common/content_settings_types.h"
 #include "chrome/common/page_zoom.h"
@@ -25,6 +27,7 @@
 #include "webkit/glue/window_open_disposition.h"
 
 class FilePath;
+class IconRequestProvider;
 class ListValue;
 class RenderViewHostDelegate;
 class SiteInstance;
@@ -358,6 +361,10 @@
   // from an Open File dialog for the form.
   void FilesSelectedInChooser(const std::vector<FilePath>& files);
 
+  // The type for icon loading.
+  typedef CancelableRequestConsumerT<int, 0> CancelableConsumer;
+  void OnIconLoaded(int request_id, SkBitmap* icon);
+
   // Notifies the RenderViewHost that its load state changed.
   void LoadStateChanged(const GURL& url, net::LoadState load_state,
                         uint64 upload_position, uint64 upload_size);
@@ -543,6 +550,8 @@
   void OnMsgSelectionChanged(const std::string& text);
   void OnMsgPasteFromSelectionClipboard();
   void OnMsgRunFileChooser(const ViewHostMsg_RunFileChooser_Params& params);
+  void OnMsgChooseIconForFiles(int request_id,
+                               const std::vector<FilePath>& filenames);
   void OnMsgRunJavaScriptMessage(const std::wstring& message,
                                  const std::wstring& default_prompt,
                                  const GURL& frame_url,
@@ -703,6 +712,10 @@
   // The session storage namespace id to be used by the associated render view.
   int64 session_storage_namespace_id_;
 
+  // For icon loading by OnMsgChooseIconForFiles().
+  CancelableConsumer cancelable_consumer_;
+  scoped_ptr<IconRequestProvider> icon_request_provider_;
+
   // Whether this render view will be used for extensions. This controls
   // what process type we use.
   bool is_extension_process_;