Cache DeviceDisplayInfo data in shared structure on native side to avoid frequent JNI calls.

ui/gfx/android/gfx_jni_registrar.cc

 // Copyright (c) 2013 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/gfx_jni_registrar.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_registrar.h"
-#include "ui/gfx/android/device_display_info.h"
 #include "ui/gfx/android/java_bitmap.h"
+#include "ui/gfx/android/shared_device_display_info.h"
 
 namespace gfx {
 namespace android {
 
 static base::android::RegistrationMethod kGfxRegisteredMethods[] = {
-  { "DeviceDisplayInfo", gfx::DeviceDisplayInfo::RegisterDeviceDisplayInfo },
+  { "SharedDeviceDisplayInfo",
+      gfx::SharedDeviceDisplayInfo::RegisterSharedDeviceDisplayInfo },

[Alexei Svitkine (slow), 2013/10/22 21:01:54]

Nit: Remove gfx:: prefix here and below since this is in the gfx namespace
already.

[ostap, 2013/10/22 21:40:42]

Done.

   { "JavaBitmap", gfx::JavaBitmap::RegisterJavaBitmap },
 };
 
 bool RegisterJni(JNIEnv* env) {
   return RegisterNativeMethods(env, kGfxRegisteredMethods,
                                arraysize(kGfxRegisteredMethods));
 }
 
 }  // namespace android
 }  // namespace gfx