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

trunk/src/chrome/browser/extensions/extension_install_prompt.cc

Index: trunk/src/chrome/browser/extensions/extension_install_prompt.cc
===================================================================
--- trunk/src/chrome/browser/extensions/extension_install_prompt.cc	(revision 224497)
+++ trunk/src/chrome/browser/extensions/extension_install_prompt.cc	(working copy)
@@ -122,7 +122,9 @@
 // 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
@@ -131,8 +133,7 @@
   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