GTK: Fix gtk-theme mode: implement GtkThemeService::GetImageNamed().

GtkThemeService injects themed images into SkBitmaps for theming. When I
started moving to the gfx::Image returning GetImageNamed() interface, I didn't
implement it at the GtkThemeService level.

BUG=106597,106060
TEST=No blue tabs in gtk-theme mode.


Review URL: http://codereview.chromium.org/8771052

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@113536 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/themes/theme_service.h

@@ -146,10 +146,9 @@ class ThemeService : public base::NonThreadSafe,
 
   // Returns a cross platform image for an id.
   //
-  // TODO(erg): Make this a virtual, exposed through ui::ThemeProvider and the
-  // main way to get theme properties out of the theme provider since it's
-  // cross platform.
-  const gfx::Image* GetImageNamed(int id) const;
+  // TODO(erg): Make this part of the ui::ThemeProvider and the main way to get
+  // theme properties out of the theme provider since it's cross platform.
+  virtual const gfx::Image* GetImageNamed(int id) const;
 
   // ui::ThemeProvider implementation.
   virtual void Init(Profile* profile) OVERRIDE;

chrome/browser/ui/gtk/gtk_theme_service.cc

@@ -303,19 +303,25 @@ void GtkThemeService::Init(Profile* profile) {
 }
 
 SkBitmap* GtkThemeService::GetBitmapNamed(int id) const {
+  // TODO(erg): Remove this const cast. The gfx::Image interface returns its
+  // images const. GetBitmapNamed() also should but doesn't and has a million
+  // callsites.
+  return const_cast<SkBitmap*>(GetImageNamed(id)->ToSkBitmap());
+}
+
+const gfx::Image* GtkThemeService::GetImageNamed(int id) const {
   // Try to get our cached version:
   ImageCache::const_iterator it = gtk_images_.find(id);
   if (it != gtk_images_.end())
     return it->second;
 
   if (use_gtk_ && IsOverridableImage(id)) {
-    // We haven't built this image yet:
-    SkBitmap* bitmap = GenerateGtkThemeBitmap(id);
-    gtk_images_[id] = bitmap;
-    return bitmap;
+    gfx::Image* image = new gfx::Image(GenerateGtkThemeBitmap(id));
+    gtk_images_[id] = image;
+    return image;
   }
 
-  return ThemeService::GetBitmapNamed(id);
+  return ThemeService::GetImageNamed(id);
 }
 
 SkColor GtkThemeService::GetColor(int id) const {

chrome/browser/ui/gtk/gtk_theme_service.h

@@ -64,6 +64,7 @@ class GtkThemeService : public ThemeService {
   // ThemeService's implementation.
   virtual void Init(Profile* profile) OVERRIDE;
   virtual SkBitmap* GetBitmapNamed(int id) const OVERRIDE;
+  virtual const gfx::Image* GetImageNamed(int id) const OVERRIDE;
   virtual SkColor GetColor(int id) const OVERRIDE;
   virtual bool HasCustomImage(int id) const OVERRIDE;
   virtual void SetTheme(const Extension* extension) OVERRIDE;
@@ -170,7 +171,7 @@ class GtkThemeService : public ThemeService {
  private:
   typedef std::map<int, SkColor> ColorMap;
   typedef std::map<int, color_utils::HSL> TintMap;
-  typedef std::map<int, SkBitmap*> ImageCache;
+  typedef std::map<int, gfx::Image*> ImageCache;
   typedef std::map<int, gfx::CairoCachedSurface*> CairoCachedSurfaceMap;
   typedef std::map<GdkDisplay*, CairoCachedSurfaceMap> PerDisplaySurfaceMap;