Enable Clang warnings for implementation files on all platforms.

ui/gfx/screen_android.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 "ui/gfx/screen.h"
 
 #include "base/logging.h"
 #include "ui/gfx/android/device_display_info.h"
 #include "ui/gfx/display.h"
 #include "ui/gfx/size_conversions.h"
 
 namespace gfx {
 
 class ScreenAndroid : public Screen {
  public:
   ScreenAndroid() {}
 
-  bool IsDIPEnabled() OVERRIDE {
-    return true;
-  }
+  virtual bool IsDIPEnabled() OVERRIDE { return true; }
 
-  gfx::Point GetCursorScreenPoint() OVERRIDE {
-    return gfx::Point();
-  }
+  virtual gfx::Point GetCursorScreenPoint() OVERRIDE { return gfx::Point(); }
 
-  gfx::NativeWindow GetWindowAtCursorScreenPoint() OVERRIDE {
+  virtual gfx::NativeWindow GetWindowAtCursorScreenPoint() OVERRIDE {
     NOTIMPLEMENTED();
     return NULL;
   }
 
-  gfx::Display GetPrimaryDisplay() const OVERRIDE {
+  virtual gfx::Display GetPrimaryDisplay() const OVERRIDE {
     gfx::DeviceDisplayInfo device_info;
     const float device_scale_factor = device_info.GetDIPScale();
     const gfx::Rect bounds_in_pixels =
         gfx::Rect(
             device_info.GetDisplayWidth(),
             device_info.GetDisplayHeight());
     const gfx::Rect bounds_in_dip =
         gfx::Rect(gfx::ToCeiledSize(gfx::ScaleSize(
             bounds_in_pixels.size(), 1.0f / device_scale_factor)));
     gfx::Display display(0, bounds_in_dip);
     display.set_device_scale_factor(device_scale_factor);
     return display;
   }
 
-  gfx::Display GetDisplayNearestWindow(gfx::NativeView view) const OVERRIDE {
+  virtual gfx::Display GetDisplayNearestWindow(
+      gfx::NativeView view) const OVERRIDE {
     return GetPrimaryDisplay();
   }
 
-  gfx::Display GetDisplayNearestPoint(const gfx::Point& point) const OVERRIDE {
+  virtual gfx::Display GetDisplayNearestPoint(
+      const gfx::Point& point) const OVERRIDE {
     return GetPrimaryDisplay();
   }
 
-  int GetNumDisplays() OVERRIDE {
-    return 1;
-  }
+  virtual int GetNumDisplays() OVERRIDE { return 1; }
 
   virtual gfx::Display GetDisplayMatching(
       const gfx::Rect& match_rect) const OVERRIDE {
     return GetPrimaryDisplay();
   }
 
   virtual void AddObserver(DisplayObserver* observer) OVERRIDE {
     // no display change on Android.
   }
 
   virtual void RemoveObserver(DisplayObserver* observer) OVERRIDE {
     // no display change on Android.
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ScreenAndroid);
 };
 
 Screen* CreateNativeScreen() {
   return new ScreenAndroid;
 }
 
 }  // namespace gfx