Revert 224473 "Remove dependency on ui::ScaleFactor from ui/gfx"

trunk/src/chrome/browser/extensions/extension_install_prompt.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/extensions/extension_install_prompt.h"
 
 #include <map>
 
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 104 matching lines @@
   0,
   0,
 };
 
 // Size of extension icon in top left of dialog.
 const int kIconSize = 69;
 
 // Returns pixel size under maximal scale factor for the icon whose device
 // independent size is |size_in_dip|
 int GetSizeForMaxScaleFactor(int size_in_dip) {
-  return static_cast<int>(size_in_dip * gfx::ImageSkia::GetMaxSupportedScale());
+  float max_scale_factor_scale =
+      ui::GetScaleFactorScale(ui::GetMaxScaleFactor());
+  return static_cast<int>(size_in_dip * max_scale_factor_scale);
 }
 
 // Returns bitmap for the default icon with size equal to the default icon's
 // pixel size under maximal supported scale factor.
 SkBitmap GetDefaultIconBitmapForMaxScaleFactor(bool is_app) {
   const gfx::ImageSkia& image = is_app ?
       extensions::IconsInfo::GetDefaultAppIcon() :
       extensions::IconsInfo::GetDefaultExtensionIcon();
-  return image.GetRepresentation(
-      gfx::ImageSkia::GetMaxSupportedScale()).sk_bitmap();
+  return image.GetRepresentation(ui::GetMaxScaleFactor()).sk_bitmap();
 }
 
 // If auto confirm is enabled then posts a task to proceed with or cancel the
 // install and returns true. Otherwise returns false.
 bool AutoConfirmPrompt(ExtensionInstallPrompt::Delegate* delegate) {
   const CommandLine* cmdline = CommandLine::ForCurrentProcess();
   if (!cmdline->HasSwitch(switches::kAppsGalleryInstallAutoConfirmForTests))
     return false;
   std::string value = cmdline->GetSwitchValueASCII(
       switches::kAppsGalleryInstallAutoConfirmForTests);
@@ skipping 653 matching lines @@
   }
 
   if (AutoConfirmPrompt(delegate_))
     return;
 
   if (show_dialog_callback_.is_null())
     GetDefaultShowDialogCallback().Run(show_params_, delegate_, prompt_);
   else
     show_dialog_callback_.Run(show_params_, delegate_, prompt_);
 }