Make WebView work for external displays (over Presentations).

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 "jni/DeviceDisplayInfo_jni.h"
 #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(
+    base::android::ScopedJavaLocalRef<jobject> context) {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  j_device_info_.Reset(
+      Java_DeviceDisplayInfo_create(env, context.obj()));
+  FetchDisplayInfoFromJava(env);
+}
+
 DeviceDisplayInfo::DeviceDisplayInfo() {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  j_device_info_.Reset(
+      Java_DeviceDisplayInfo_create(env,
+        base::android::GetApplicationContext()));
+  FetchDisplayInfoFromJava(env);
 }
 
 DeviceDisplayInfo::~DeviceDisplayInfo() {
 }
 
-int DeviceDisplayInfo::GetDisplayHeight() {
-  return SharedDeviceDisplayInfo::GetInstance()->GetDisplayHeight();
+void DeviceDisplayInfo::FetchDisplayInfoFromJava(JNIEnv* env) {
+  UpdateDisplayInfo(
+      Java_DeviceDisplayInfo_getDisplayHeight(env, j_device_info_.obj()),
+      Java_DeviceDisplayInfo_getDisplayWidth(env, j_device_info_.obj()),
+      Java_DeviceDisplayInfo_getPhysicalDisplayHeight(env,
+                                                      j_device_info_.obj()),
+      Java_DeviceDisplayInfo_getPhysicalDisplayWidth(env, j_device_info_.obj()),
+      Java_DeviceDisplayInfo_getBitsPerPixel(env, j_device_info_.obj()),
+      Java_DeviceDisplayInfo_getBitsPerComponent(env, j_device_info_.obj()),
+      Java_DeviceDisplayInfo_getDIPScale(env, j_device_info_.obj()),
+      Java_DeviceDisplayInfo_getSmallestDIPWidth(env, j_device_info_.obj()),
+      Java_DeviceDisplayInfo_getRotationDegrees(env, j_device_info_.obj()));
 }
 
-int DeviceDisplayInfo::GetDisplayWidth() {
-  return SharedDeviceDisplayInfo::GetInstance()->GetDisplayWidth();
+void DeviceDisplayInfo::UpdateDisplayInfo(jint display_height,
+                                          jint display_width,
+                                          jint physical_display_height,
+                                          jint physical_display_width,
+                                          jint bits_per_pixel,
+                                          jint bits_per_component,
+                                          jdouble dip_scale,
+                                          jint smallest_dip_width,
+                                          jint rotation_degrees) {
+  display_height_ = static_cast<int>(display_height);
+  display_width_ = static_cast<int>(display_width);
+  physical_display_height_ = static_cast<int>(physical_display_height);
+  physical_display_width_ = static_cast<int>(physical_display_width);
+  bits_per_pixel_ = static_cast<int>(bits_per_pixel);
+  bits_per_component_ = static_cast<int>(bits_per_component);
+  dip_scale_ = static_cast<double>(dip_scale);
+  smallest_dip_width_ = static_cast<int>(smallest_dip_width);
+  rotation_degrees_ = static_cast<int>(rotation_degrees);
 }
 
-int DeviceDisplayInfo::GetPhysicalDisplayHeight() {
-  return SharedDeviceDisplayInfo::GetInstance()->GetPhysicalDisplayHeight();
+int DeviceDisplayInfo::GetDisplayHeight() const {
+  return display_height_;
 }
 
-int DeviceDisplayInfo::GetPhysicalDisplayWidth() {
-  return SharedDeviceDisplayInfo::GetInstance()->GetPhysicalDisplayWidth();
+int DeviceDisplayInfo::GetDisplayWidth() const {
+  return display_width_;
 }
 
-int DeviceDisplayInfo::GetBitsPerPixel() {
-  return SharedDeviceDisplayInfo::GetInstance()->GetBitsPerPixel();
+int DeviceDisplayInfo::GetPhysicalDisplayHeight() const {
+  return physical_display_height_;
 }
 
-int DeviceDisplayInfo::GetBitsPerComponent() {
-  return SharedDeviceDisplayInfo::GetInstance()->GetBitsPerComponent();
+int DeviceDisplayInfo::GetPhysicalDisplayWidth() const {
+  return physical_display_width_;
 }
 
-double DeviceDisplayInfo::GetDIPScale() {
-  return SharedDeviceDisplayInfo::GetInstance()->GetDIPScale();
+int DeviceDisplayInfo::GetBitsPerPixel() const {
+  return bits_per_pixel_;
 }
 
-int DeviceDisplayInfo::GetSmallestDIPWidth() {
-  return SharedDeviceDisplayInfo::GetInstance()->GetSmallestDIPWidth();
+int DeviceDisplayInfo::GetBitsPerComponent() const {
+  return bits_per_component_;
 }
 
-int DeviceDisplayInfo::GetRotationDegrees() {
-  return SharedDeviceDisplayInfo::GetInstance()->GetRotationDegrees();
+double DeviceDisplayInfo::GetDIPScale() const {
+  return dip_scale_;
+}
+
+int DeviceDisplayInfo::GetSmallestDIPWidth() const {
+  return smallest_dip_width_;
+}
+
+int DeviceDisplayInfo::GetRotationDegrees() const {
+  return rotation_degrees_;
+}
+
+// static
+bool DeviceDisplayInfo::RegisterDeviceDisplayInfo(JNIEnv* env) {
+  return RegisterNativesImpl(env);
 }
 
 }  // namespace gfx