Add ability to store hidpi theme images in data pack

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 "base/basictypes.h"
 #include "third_party/skia/include/core/SkColor.h"
+#include "ui/base/layout.h"
 #include "ui/base/ui_export.h"
 
 #if defined(OS_MACOSX)
 #ifdef __OBJC__
 @class NSColor;
 @class NSGradient;
 @class NSImage;
 #else
 class NSColor;
 class NSGradient;
@@ skipping 50 matching lines @@
   // 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).
   virtual bool HasCustomImage(int id) const = 0;
 
   // Reads the image data from the theme file into the specified vector. Only
   // valid for un-themed resources and the themed IDR_THEME_NTP_* in most
   // implementations of ThemeProvider. Returns NULL on error.
-  virtual base::RefCountedMemory* GetRawData(int id) const = 0;
+  virtual base::RefCountedMemory* GetRawData(
+      int id,
+      ui::ScaleFactor scale_factor) const = 0;
 
 #if defined(OS_MACOSX) && !defined(TOOLKIT_VIEWS)
   // Gets the NSImage with the specified |id|.
   //
   // The bitmap is not assumed to exist. If a theme does not provide an image,
   // if |allow_default| is true, then the default image will be returned, else
   // this function will return nil.
   virtual NSImage* GetNSImageNamed(int id, bool allow_default) const = 0;
 
   // Gets the NSImage that GetNSImageNamed (above) would return, but returns it
@@ skipping 27 matching lines @@
   // is missing.
 
   // As above, but flips it in RTL locales.
   virtual GdkPixbuf* GetRTLEnabledPixbufNamed(int id) const = 0;
 #endif
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_THEME_PROVIDER_H_