Fixed extension icon source handling of component extensions.

chrome/browser/ui/webui/extension_icon_source.h

Index: chrome/browser/ui/webui/extension_icon_source.h
===================================================================
--- chrome/browser/ui/webui/extension_icon_source.h	(revision 98624)
+++ chrome/browser/ui/webui/extension_icon_source.h	(working copy)
@@ -97,6 +97,12 @@
   // Loads the default image for |request_id| and returns to the client.
   void LoadDefaultImage(int request_id);
 
+  // Tries loading component extension image. These usually come from resources
+  // instead of file system. Returns false if a given |icon| does not have
+  // a corresponding image in bundled resources.
+  bool TryLoadingComponentExtensionImage(const ExtensionResource& icon,
+                                         int request_id);
+
   // Loads the extension's |icon| for the given |request_id| and returns the
   // image to the client.
   void LoadExtensionImage(const ExtensionResource& icon, int request_id);