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

ash/utility/screenshot_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/utility/screenshot_controller.h"
 
 #include <cmath>
 
 #include "ash/common/shell_window_ids.h"
 #include "ash/display/mouse_cursor_event_filter.h"
@@ skipping 100 matching lines @@
   void set_cursor_location_in_root(const gfx::Point& point) {
     cursor_location_in_root_ = point;
   }
 
  private:
   // ui::LayerDelegate:
   void OnPaintLayer(const ui::PaintContext& context) override {
     const SkColor kSelectedAreaOverlayColor = 0x60000000;
     // Screenshot area representation: transparent hole with half opaque gray
     // overlay.
-    gfx::Rect rect(region_);
     ui::PaintRecorder recorder(context, layer()->size());
 
     recorder.canvas()->FillRect(gfx::Rect(layer()->size()),
                                 kSelectedAreaOverlayColor);
 
     DrawPseudoCursor(recorder.canvas());
 
     if (!region_.IsEmpty())
       recorder.canvas()->FillRect(region_, SK_ColorBLACK,
                                   SkXfermode::kClear_Mode);
@@ skipping 372 matching lines @@
 
 void ScreenshotController::OnDisplayMetricsChanged(
     const display::Display& display,
     uint32_t changed_metrics) {}
 
 void ScreenshotController::OnWindowDestroying(aura::Window* window) {
   SetSelectedWindow(nullptr);
 }
 
 }  // namespace ash