Change chrome:// favicons in tabstrip based on theming.

ui/base/theme_provider.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 UI_BASE_THEME_PROVIDER_H_
 #define UI_BASE_THEME_PROVIDER_H_
 
 #include "build/build_config.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/base/layout.h"
@@ skipping 10 matching lines @@
 class NSImage;
 #endif  // __OBJC__
 #endif  // OS_*
 
 class SkBitmap;
 
 namespace base {
 class RefCountedMemory;
 }
 
+namespace color_utils {
+struct HSL;
+}
+
 namespace gfx {
 class ImageSkia;
 }
 
 namespace ui {
 
 ////////////////////////////////////////////////////////////////////////////////
 //
 // ThemeProvider
 //
 //   ThemeProvider is an abstract class that defines the API that should be
 //   implemented to provide bitmaps and color information for a given theme.
 //
 ////////////////////////////////////////////////////////////////////////////////
 
 class UI_BASE_EXPORT ThemeProvider {
  public:
   virtual ~ThemeProvider();
 
   // Get the image specified by |id|. An implementation of ThemeProvider should
   // have its own source of ids (e.g. an enum, or external resource bundle).
   virtual gfx::ImageSkia* GetImageSkiaNamed(int id) const = 0;
 
   // Get the color specified by |id|.
   virtual SkColor GetColor(int id) const = 0;
 
+  // Get the HSL shift specified by |id|.
+  virtual color_utils::HSL GetTint(int id) const = 0;
+
   // Get the property (e.g. an alignment expressed in an enum, or a width or
   // height) specified by |id|.
   virtual int GetDisplayProperty(int id) const = 0;
 
   // Whether we should use the native system frame (typically Aero glass) or
   // a custom frame.
   virtual bool ShouldUseNativeFrame() const = 0;
 
   // Whether or not we have a certain image. Used for when the default theme
   // doesn't provide a certain image, but custom themes might (badges, etc).
@@ skipping 36 matching lines @@
   virtual NSGradient* GetNSGradient(int id) const = 0;
 
   // Whether the "increase contrast" accessibility setting is enabled.
   virtual bool ShouldIncreaseContrast() const = 0;
 #endif
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_THEME_PROVIDER_H_