Android: Add support for returning real screen resolution.

ui/gfx/android/device_display_info.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/android/device_display_info.h"
 
 #include "base/logging.h"
 #include "ui/gfx/android/shared_device_display_info.h"
 
 namespace gfx {
 
 DeviceDisplayInfo::DeviceDisplayInfo() {
 }
 
 DeviceDisplayInfo::~DeviceDisplayInfo() {
 }
 
 int DeviceDisplayInfo::GetDisplayHeight() {
   return SharedDeviceDisplayInfo::GetInstance()->GetDisplayHeight();
 }
 
 int DeviceDisplayInfo::GetDisplayWidth() {
   return SharedDeviceDisplayInfo::GetInstance()->GetDisplayWidth();
 }
 
+int DeviceDisplayInfo::GetRealDisplayHeight(bool& supported) {
+  int height = SharedDeviceDisplayInfo::GetInstance()->GetRealDisplayHeight();
+  if (!(supported = height > 0))

[no sievers, 2013/12/20 19:51:19]

And could we just return 0 here and below if not supported (pre-JB MR1)?

+    height = GetDisplayHeight();
+  return height;
+}
+
+int DeviceDisplayInfo::GetRealDisplayWidth(bool& supported) {
+  int width = SharedDeviceDisplayInfo::GetInstance()->GetRealDisplayWidth();
+  if (!(supported = width > 0))
+    width = GetDisplayWidth();
+  return width;
+}
+
 int DeviceDisplayInfo::GetBitsPerPixel() {
   return SharedDeviceDisplayInfo::GetInstance()->GetBitsPerPixel();
 }
 
 int DeviceDisplayInfo::GetBitsPerComponent() {
   return SharedDeviceDisplayInfo::GetInstance()->GetBitsPerComponent();
 }
 
 double DeviceDisplayInfo::GetDIPScale() {
   return SharedDeviceDisplayInfo::GetInstance()->GetDIPScale();
 }
 
 int DeviceDisplayInfo::GetSmallestDIPWidth() {
   return SharedDeviceDisplayInfo::GetInstance()->GetSmallestDIPWidth();
 }
 
 }  // namespace gfx