Add tinted static UI resource cache

ui/android/resources/resource_manager.cc

 // Copyright 2014 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.
 
 #include "ui/android/resources/resource_manager.h"
 
 #include "ui/gfx/geometry/insets_f.h"
 
 namespace ui {
 
-ResourceManager::Resource::Resource() {
+ResourceManager::Resource::Resource()
+    : tint(0) {
 }
 
 ResourceManager::Resource::~Resource() {
 }
 
 gfx::Rect ResourceManager::Resource::Border(const gfx::Size& bounds) const {
   return Border(bounds, gfx::InsetsF(1.f, 1.f, 1.f, 1.f));
 }
 
 gfx::Rect ResourceManager::Resource::Border(const gfx::Size& bounds,
                                             const gfx::InsetsF& scale) const {
   // Calculate whether or not we need to scale down the border if the bounds of
   // the layer are going to be smaller than the aperture padding.
   float x_scale = std::min((float)bounds.width() / size.width(), 1.f);
   float y_scale = std::min((float)bounds.height() / size.height(), 1.f);
 
   float left_scale = std::min(x_scale * scale.left(), 1.f);
   float right_scale = std::min(x_scale * scale.right(), 1.f);
   float top_scale = std::min(y_scale * scale.top(), 1.f);
   float bottom_scale = std::min(y_scale * scale.bottom(), 1.f);
 
   return gfx::Rect(aperture.x() * left_scale, aperture.y() * top_scale,
                    (size.width() - aperture.width()) * right_scale,
                    (size.height() - aperture.height()) * bottom_scale);
 }
 
 }  // namespace ui