Use correct favicon scale factor on Android.

ui/base/layout.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_LAYOUT_H_
 #define UI_BASE_LAYOUT_H_
 
 #include <vector>
 
 #include "build/build_config.h"
@@ skipping 21 matching lines @@
 
 // Supported UI scale factors for the platform. This is used as an index
 // into the array |kScaleFactorScales| which maps the enum value to a float.
 // SCALE_FACTOR_NONE is used for density independent resources such as
 // string, html/js files or an image that can be used for any scale factors
 // (such as wallpapers).
 enum ScaleFactor {
   SCALE_FACTOR_NONE = 0,
   SCALE_FACTOR_100P,
   SCALE_FACTOR_140P,
+  SCALE_FACTOR_150P,
   SCALE_FACTOR_180P,
   SCALE_FACTOR_200P,
+  SCALE_FACTOR_300P,
 
   NUM_SCALE_FACTORS  // This always appears last.
 };
 
 // Returns the float scale value for |scale_factor|.
 UI_EXPORT float GetScaleFactorScale(ScaleFactor scale_factor);
 
 // Returns the supported ScaleFactor which most closely matches |scale|.
 // Converting from float to ScaleFactor is inefficient and should be done as
 // little as possible.
@@ skipping 16 matching lines @@
 namespace test {
 
 UI_EXPORT void SetSupportedScaleFactors(
     const std::vector<ScaleFactor>& scale_factors);
 
 }  // namespace test
 
 }  // namespace ui
 
 #endif  // UI_BASE_LAYOUT_H_