Change browser/page action default icon defined in manifest to support hidpi.

chrome/browser/ui/cocoa/location_bar/page_action_decoration.mm

Index: chrome/browser/ui/cocoa/location_bar/page_action_decoration.mm
diff --git a/chrome/browser/ui/cocoa/location_bar/page_action_decoration.mm b/chrome/browser/ui/cocoa/location_bar/page_action_decoration.mm
index 8dc20def08c845940dd76581edb46487aa2f2a85..41d19ce89cb0e7190319a5840c19cc05310e14a4 100644
--- a/chrome/browser/ui/cocoa/location_bar/page_action_decoration.mm
+++ b/chrome/browser/ui/cocoa/location_bar/page_action_decoration.mm
@@ -49,7 +49,6 @@ PageActionDecoration::PageActionDecoration(
     : owner_(NULL),
       browser_(browser),
       page_action_(page_action),
-      tracker_(this),
       current_tab_id_(-1),
       preview_enabled_(false),
       ALLOW_THIS_IN_INITIALIZER_LIST(scoped_icon_animation_observer_(
@@ -60,19 +59,7 @@ PageActionDecoration::PageActionDecoration(
       GetExtensionById(page_action->extension_id(), false);
   DCHECK(extension);
 
-  // Load all the icons declared in the manifest. This is the contents of the
-  // icons array, plus the default_icon property, if any.
-  std::vector<std::string> icon_paths(*page_action->icon_paths());
-  if (!page_action_->default_icon_path().empty())
-    icon_paths.push_back(page_action_->default_icon_path());
-
-  for (std::vector<std::string>::iterator iter = icon_paths.begin();
-       iter != icon_paths.end(); ++iter) {
-    tracker_.LoadImage(extension, extension->GetResource(*iter),
-                       gfx::Size(Extension::kPageActionIconMaxSize,
-                                 Extension::kPageActionIconMaxSize),
-                       ImageLoadingTracker::DONT_CACHE);
-  }
+  icon_factory_.reset(new ExtensionActionIconFactory(extension, this));
 
   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_HOST_VIEW_SHOULD_CLOSE,
       content::Source<Profile>(browser_->profile()));
@@ -140,23 +127,7 @@ bool PageActionDecoration::ActivatePageAction(NSRect frame) {
   return true;
 }
 
-void PageActionDecoration::OnImageLoaded(const gfx::Image& image,
-                                         const std::string& extension_id,
-                                         int index) {
-  // We loaded icons()->size() icons, plus one extra if the Page Action had
-  // a default icon.
-  int total_icons = static_cast<int>(page_action_->icon_paths()->size());
-  if (!page_action_->default_icon_path().empty())
-    total_icons++;
-  DCHECK(index < total_icons);
-
-  // Map the index of the loaded image back to its name. If we ever get an
-  // index greater than the number of icons, it must be the default icon.
-  if (index < static_cast<int>(page_action_->icon_paths()->size()))
-    page_action_->CacheIcon(page_action_->icon_paths()->at(index), image);
-  else
-    page_action_->CacheIcon(page_action_->default_icon_path(), image);
-
+void PageActionDecoration::OnIconUpdated() {
   // If we have no owner, that means this class is still being constructed.
   TabContents* tab_contents = owner_ ? owner_->GetTabContents() : NULL;
   if (tab_contents) {
@@ -178,7 +149,8 @@ void PageActionDecoration::UpdateVisibility(WebContents* contents,
     SetToolTip(page_action_->GetTitle(current_tab_id_));
 
     // Set the image.
-    gfx::Image icon = page_action_->GetIcon(current_tab_id_);
+    gfx::Image icon =
+        page_action_->GetIcon(current_tab_id_, icon_factory_.get());
     if (!icon.IsEmpty()) {
       SetImage(icon.ToNSImage());
     } else if (!GetImage()) {