Fix gcc 4.7 building problem.

chrome/browser/ui/views/constrained_window_frame_simple.cc

 // 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.
 
 #include "chrome/browser/ui/views/constrained_window_frame_simple.h"
 
 #include "chrome/browser/ui/constrained_window.h"
 #include "chrome/browser/ui/views/constrained_window_views.h"
 #include "grit/ui_resources.h"
 #include "grit/chromium_strings.h"
@@ skipping 172 matching lines @@
 
 int ConstrainedWindowFrameSimple::NonClientHitTest(const gfx::Point& point) {
   if (!bounds().Contains(point))
     return HTNOWHERE;
   return HTCLIENT;
 }
 
 void ConstrainedWindowFrameSimple::GetWindowMask(const gfx::Size& size,
                                                  gfx::Path* window_mask) {
 #if defined(USE_AURA)
-  SkRect rect = {0, 0, size.width() - 1, size.height() - 1};
+  SkRect rect = {0, 0, static_cast<SkScalar>(size.width() - 1),
+                 static_cast<SkScalar>(size.height() - 1)};
 #else
   // There appears to be a bug in the window mask calculation on Windows
   // which causes the width, but not the height, to be off by one.
   SkRect rect = {0, 0, size.width(), size.height() - 1};
 #endif
   SkScalar radius = SkIntToScalar(ConstrainedWindow::kBorderRadius);
   SkScalar radii[8] = {radius, radius, radius, radius,
                        radius, radius, radius, radius};
 
   // NB: We're not using the addRoundRect uniform radius overload as it
@@ skipping 30 matching lines @@
   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
   views::ImageButton* close_button = new views::ImageButton(this);
   close_button->SetImage(views::CustomButton::BS_NORMAL,
                           rb.GetImageSkiaNamed(IDR_SHARED_IMAGES_X));
   close_button->SetImage(views::CustomButton::BS_HOT,
                           rb.GetImageSkiaNamed(IDR_SHARED_IMAGES_X_HOVER));
   close_button->SetImage(views::CustomButton::BS_PUSHED,
                           rb.GetImageSkiaNamed(IDR_SHARED_IMAGES_X_HOVER));
   return close_button;
 }