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

ash/magnifier/magnification_controller.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 "ash/magnifier/magnification_controller.h"
 
 #include <memory>
 #include <utility>
 
 #include "ash/accelerators/accelerator_controller.h"
@@ skipping 752 matching lines @@
 
 void MagnificationControllerImpl::MoveMagnifierWindowFollowRect(
     const gfx::Rect& rect) {
   DCHECK(root_window_);
   bool should_pan = false;
 
   const gfx::Rect viewport_rect = GetViewportRect();
   const int left = viewport_rect.x();
   const int right = viewport_rect.right();
   const gfx::Point rect_center = rect.CenterPoint();
-  const gfx::Point window_center = viewport_rect.CenterPoint();
 
   int x = left;
   if (rect.x() < left || right < rect.right()) {
     // Panning horizontally.
     x = rect_center.x() - viewport_rect.width() / 2;
     should_pan = true;
   }
 
   const int top = viewport_rect.y();
   const int bottom = viewport_rect.bottom();
@@ skipping 71 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // MagnificationController:
 
 // static
 MagnificationController* MagnificationController::CreateInstance() {
   return new MagnificationControllerImpl();
 }
 
 }  // namespace ash