Attempt to load component extension favicon from the resources first.

chrome/browser/extensions/image_loading_tracker.cc

 // 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.
 
 #include "chrome/browser/extensions/image_loading_tracker.h"
 
 #include "base/bind.h"
 #include "base/file_util.h"
+#include "chrome/browser/ui/webui/extensions/extension_icon_source.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_resource.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/notification_service.h"
+#include "grit/component_extension_resources_map.h"
 #include "skia/ext/image_operations.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/gfx/image/image.h"
 #include "webkit/glue/image_decoder.h"
 
 using content::BrowserThread;
 
 ////////////////////////////////////////////////////////////////////////////////
 // ImageLoadingTracker::Observer
 
@@ skipping 160 matching lines @@
 
   for (std::vector<ImageInfo>::const_iterator it = info_list.begin();
        it != info_list.end(); ++it) {
     // If we don't have a path we don't need to do any further work, just
     // respond back.
     if (it->resource.relative_path().empty()) {
       OnImageLoaded(NULL, it->resource, it->max_size, id, false);
       continue;
     }
 
+    SkBitmap* from_resources = TryLoadingComponentExtensionImage(extension,
+                                                                 it->resource);
+    if (from_resources) {
+      OnImageLoaded(from_resources, it->resource, it->max_size, id, false);
+      continue;
+    }
+
     DCHECK(extension->path() == it->resource.extension_root());
 
     // See if the extension has the image already.
     if (extension->HasCachedImage(it->resource, it->max_size)) {
       SkBitmap image = extension->GetCachedImage(it->resource, it->max_size);
       OnImageLoaded(&image, it->resource, it->max_size, id, false);
       continue;
     }
 
     // Instruct the ImageLoader to load this on the File thread. LoadImage does
     // not block.
     if (!loader_)
       loader_ = new ImageLoader(this);
     loader_->LoadImage(it->resource, it->max_size, id);
   }
 }
 
+SkBitmap* ImageLoadingTracker::TryLoadingComponentExtensionImage(
+    const Extension* extension,
+    const ExtensionResource& resource) {
+  if (extension->location() != Extension::COMPONENT)
+    return NULL;
+
+  FilePath directory_path = extension->path();
+  FilePath relative_path = directory_path.BaseName().Append(
+      resource.relative_path());
+
+  for (size_t i = 0; i < kComponentExtensionResourcesSize; ++i) {
+    FilePath bm_resource_path =
+        FilePath().AppendASCII(kComponentExtensionResources[i].name);
+    bm_resource_path = bm_resource_path.NormalizePathSeparators();
+
+    if (relative_path == bm_resource_path) {
+      return ExtensionIconSource::LoadImageByResourceId(
+          kComponentExtensionResources[i].value);
+    }
+  }
+  return NULL;
+}
+
 void ImageLoadingTracker::OnImageLoaded(
     SkBitmap* image,
     const ExtensionResource& resource,
     const gfx::Size& original_size,
     int id,
     bool should_cache) {
   LoadMap::iterator load_map_it = load_map_.find(id);
   DCHECK(load_map_it != load_map_.end());
   PendingLoadInfo* info = &load_map_it->second;
 
@@ skipping 45 matching lines @@
   // Remove reference to this extension from all pending load entries. This
   // ensures we don't attempt to cache the image when the load completes.
   for (LoadMap::iterator i = load_map_.begin(); i != load_map_.end(); ++i) {
     PendingLoadInfo* info = &i->second;
     if (info->extension == extension) {
       info->extension = NULL;
       info->cache = DONT_CACHE;
     }
   }
 }