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

chrome/common/extensions/extension_action.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 CHROME_COMMON_EXTENSIONS_EXTENSION_ACTION_H_
 #define CHROME_COMMON_EXTENSIONS_EXTENSION_ACTION_H_
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/memory/linked_ptr.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/memory/scoped_vector.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
+#include "chrome/common/extensions/extension_icon_factory_delegate.h"
+#include "chrome/common/extensions/extension_icon_set.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/base/animation/linear_animation.h"
 
 class GURL;
 class SkBitmap;
 class SkDevice;
 
 namespace gfx {
 class Canvas;
 class Image;
@@ skipping 125 matching lines @@
   }
 
   // If tab |tab_id| has a set title, return it.  Otherwise, return
   // the default title.
   std::string GetTitle(int tab_id) const { return GetValue(&title_, tab_id); }
 
   // Icons are a bit different because the default value can be set to either a
   // bitmap or a path. However, conceptually, there is only one default icon.
   // Setting the default icon using a path clears the bitmap and vice-versa.
 
-  // Since ExtensionAction, living in common/, can't interact with the browser
-  // to load images, the UI code needs to load the icon. Load the image there
-  // using an ImageLoadingTracker and call CacheIcon(image) with the result.
-  //
-  // If an image is cached redundantly, the first load will be used.
-  void CacheIcon(const gfx::Image& icon);
-
   // Set this action's icon bitmap on a specific tab.
   void SetIcon(int tab_id, const gfx::Image& image);
 
-  // Get the icon for a tab, or the default if no icon was set for this tab,
-  // retrieving icons that have been specified by path from the previous
-  // arguments to CacheIcon().  If the default icon isn't found in the cache,
-  // returns the puzzle piece icon.
-  gfx::Image GetIcon(int tab_id) const;
+  // Get the icon for a tab. If the default icon or pare action icon has to be
+  // returned, |icon_factory| will be used to get the actual icon.
+  // |icon_factory| is used because the icon has to be loaded using
+  // extensions::IconImage, which cannot be done from chrome/common/. The
+  // factory implementation should handle asynchronous icon loading.
+  // If no icon is specified for the tab, returns the puzzle piece icon.
+  gfx::Image GetIcon(int tab_id,
+                     ExtensionIconFactoryDelegate* icon_factory) const;
 
   // Gets the icon that has been set using |SetIcon| for the tab.
   gfx::ImageSkia GetExplicitlySetIcon(int tab_id) const;
 
   // Non-tab-specific icon path. This is used to support the default_icon key of
   // page and browser actions.
-  void set_default_icon_path(const std::string& path) {
-    default_icon_path_ = path;
+  void set_default_icon(scoped_ptr<ExtensionIconSet> icon_set) {
+     default_icon_ = icon_set.Pass();
   }
-  const std::string& default_icon_path() const {
-    return default_icon_path_;
+
+  const ExtensionIconSet* default_icon() const {
+    return default_icon_.get();
   }
 
   // Set this action's badge text on a specific tab.
   void SetBadgeText(int tab_id, const std::string& text) {
     SetValue(&badge_text_, tab_id, text);
   }
   // Get the badge text for a tab, or the default if no badge text was set.
   std::string GetBadgeText(int tab_id) const {
     return GetValue(&badge_text_, tab_id);
   }
@@ skipping 47 matching lines @@
   class IconWithBadgeImageSource;
 
   // Runs an animation on a tab.
   void RunIconAnimation(int tab_id);
 
   // If the icon animation is running on tab |tab_id|, applies it to
   // |orig| and returns the result. Otherwise, just returns |orig|.
   gfx::ImageSkia ApplyIconAnimation(int tab_id,
                                     const gfx::ImageSkia& orig) const;
 
+  // Returns width of the current icon for tab_id.
+  int GetIconWidth(int tab_id) const;
+
   // Paints badge with specified parameters to |canvas|.
   static void DoPaintBadge(gfx::Canvas* canvas,
                            const gfx::Rect& bounds,
                            const std::string& text,
                            const SkColor& text_color_in,
                            const SkColor& background_color_in,
                            int icon_width);
 
   template <class T>
   struct ValueTraits {
@@ skipping 34 matching lines @@
   std::map<int, SkColor> badge_text_color_;
   std::map<int, Appearance> appearance_;
 
   // IconAnimations are destroyed by a delayed task on the UI message loop so
   // that even if the Extension and ExtensionAction are destroyed on a non-UI
   // thread, the animation will still only be touched from the UI thread.  This
   // causes the WeakPtr in this map to become NULL.  GetIconAnimation() removes
   // NULLs to prevent the map from growing without bound.
   mutable std::map<int, base::WeakPtr<IconAnimation> > icon_animation_;
 
-  std::string default_icon_path_;
+  // ExtensionIconSet containing paths to bitmaps from which default icon's
+  // image representations will be selected.
+  scoped_ptr<const ExtensionIconSet> default_icon_;
 
   // The id for the ExtensionAction, for example: "RssPageAction". This is
   // needed for compat with an older version of the page actions API.
   std::string id_;
 
-  // Saves the arguments from CacheIcon() calls.
-  scoped_ptr<gfx::ImageSkia> cached_icon_;
-
   // True if the ExtensionAction's settings have changed from what was
   // specified in the manifest.
   bool has_changed_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionAction);
 };
 
 template<>
 struct ExtensionAction::ValueTraits<int> {
   static int CreateEmpty() {
     return -1;
   }
 };
 
 #endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_ACTION_H_