Various optimizations to reduce the number of temporary allocations.

chrome/browser/themes/theme_properties.h

 // Copyright (c) 2013 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_BROWSER_THEMES_THEME_PROPERTIES_H_
 #define CHROME_BROWSER_THEMES_THEME_PROPERTIES_H_
 
 #include <set>
 #include <string>
 
@@ skipping 111 matching lines @@
   static int StringToTiling(const std::string& tiling);
 
   // Converts a bitmask of Alignment into a string like "top left". The result
   // is used to generate a CSS value.
   static std::string AlignmentToString(int alignment);
 
   // Converts a Tiling into a string like "no-repeat". The result is used to
   // generate a CSS value.
   static std::string TilingToString(int tiling);
 
-  // Returns true if the image is themeable.
-  static bool IsThemeableImage(int resource_id);
-
   // Returns the set of IDR_* resources that should be tinted.
   // This method is not thread safe.
   static const std::set<int>& GetTintableToolbarButtons();
 
   // Returns the default tint for the given tint |id| TINT_* enum value.
   // Returns an HSL value of {-1, -1, -1} if |id| is invalid.
   static color_utils::HSL GetDefaultTint(int id);
 
   // Returns the default color for the given color |id| COLOR_* enum value.
   // Returns SK_ColorRED if |id| is invalid.
   static SkColor GetDefaultColor(int id);
 
   // Returns the default value for the given property |id|. Returns -1 if |id|
   // is invalid.
   static int GetDefaultDisplayProperty(int id);
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(ThemeProperties);
 };
 
 #endif  // CHROME_BROWSER_THEMES_THEME_PROPERTIES_H_