Make various gfx classes more amenable to use as compile-time constants.

ash/touch/touch_transformer_controller.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 "ash/touch/touch_transformer_controller.h"
 
 #include "ash/display/display_manager.h"
 #include "ash/display/window_tree_host_manager.h"
 #include "ash/host/ash_window_tree_host.h"
 #include "ash/root_window_controller.h"
@@ skipping 168 matching lines @@
     display1_id = list[0];
     display2_id = list[1];
     DCHECK(display1_id != display::Display::kInvalidDisplayID &&
            display2_id != display::Display::kInvalidDisplayID);
     display1 = display_manager->GetDisplayInfo(display1_id);
     display2 = display_manager->GetDisplayInfo(display2_id);
     UpdateTouchRadius(display1);
     UpdateTouchRadius(display2);
   }
 
-  gfx::Size fb_size =
-      Shell::GetInstance()->display_configurator()->framebuffer_size();
-
   if (display_manager->IsInMirrorMode()) {
     int64_t primary_display_id =
         window_tree_host_manager->GetPrimaryDisplayId();
     if (GetDisplayManager()->SoftwareMirroringEnabled()) {
       // In extended but software mirroring mode, there is a WindowTreeHost for
       // each display, but all touches are forwarded to the primary root
       // window's WindowTreeHost.
       DisplayInfo target_display =
           primary_display_id == display1_id ? display1 : display2;
       UpdateTouchTransform(target_display.id(), display1, target_display);
@@ skipping 21 matching lines @@
 
 void TouchTransformerController::OnDisplaysInitialized() {
   UpdateTouchTransformer();
 }
 
 void TouchTransformerController::OnDisplayConfigurationChanged() {
   UpdateTouchTransformer();
 }
 
 }  // namespace ash