ui: Use physical size for gfx::Display on Android if available.

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"
@@ skipping 16 matching lines @@
   virtual gfx::NativeWindow GetWindowAtScreenPoint(const gfx::Point& point)
       OVERRIDE {
     NOTIMPLEMENTED();
     return NULL;
   }
 
   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());
+        gfx::Rect(device_info.GetPhysicalDisplayWidth()
+                      ? device_info.GetPhysicalDisplayWidth()

[oshima, 2014/07/09 17:44:33]

It's not your fault, but the name "Physical" sounds a bit misleading. Both are
physical (in pixels), but the difference is that whether or not it includes
system decor area.

Can you add comment and explain the difference?

[reveman, 2014/07/09 18:51:41]

Done.

+                      : device_info.GetDisplayWidth(),
+                  device_info.GetPhysicalDisplayHeight()
+                      ? device_info.GetPhysicalDisplayHeight()
+                      : 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);
     if (!gfx::Display::HasForceDeviceScaleFactor())
       display.set_device_scale_factor(device_scale_factor);
     display.SetRotationAsDegree(device_info.GetRotationDegrees());
     return display;
   }
 
@@ skipping 28 matching lines @@
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ScreenAndroid);
 };
 
 Screen* CreateNativeScreen() {
   return new ScreenAndroid;
 }
 
 }  // namespace gfx