ozone: Use gfx::Display size for touch scaling

ui/gfx/ozone/surface_factory_ozone.cc

 // Copyright (c) 2013 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/gfx/ozone/surface_factory_ozone.h"
 
 #include <stdlib.h>
 
 #include "base/command_line.h"
 #include "ui/gfx/vsync_provider.h"
@@ skipping 11 matching lines @@
 
 SurfaceFactoryOzone* SurfaceFactoryOzone::GetInstance() {
   CHECK(impl_) << "No SurfaceFactoryOzone implementation set.";
   return impl_;
 }
 
 void SurfaceFactoryOzone::SetInstance(SurfaceFactoryOzone* impl) {
   impl_ = impl;
 }
 
-const char* SurfaceFactoryOzone::DefaultDisplaySpec() {
-  char* envvar = getenv("ASH_DISPLAY_SPEC");
-  if (envvar)
-    return envvar;
-  return  "720x1280*2";
-}
-
 gfx::Screen* SurfaceFactoryOzone::CreateDesktopScreen() {
   return NULL;
 }
 
 intptr_t SurfaceFactoryOzone::GetNativeDisplay() {
   return 0;
 }
 
 bool SurfaceFactoryOzone::SchedulePageFlip(gfx::AcceleratedWidget w) {
   return true;
 }
 
 SkCanvas* SurfaceFactoryOzone::GetCanvasForWidget(gfx::AcceleratedWidget w) {
   return NULL;
 }
 
 const int32* SurfaceFactoryOzone::GetEGLSurfaceProperties(
     const int32* desired_attributes) {
   return desired_attributes;
 }
 
 }  // namespace gfx