Reland of Android: support multiple displays on C++ side

ui/android/display_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/android/display_android.h"

[boliu, 2016/10/26 17:24:19]

ui/display/android pls

[Tima Vaisburd, 2016/10/27 07:55:58]

This file is gone, JNI is handled by
ui/display/andriod/display_android_manager.cc 

+
+#include "base/logging.h"
+#include "jni/DisplayAndroid_jni.h"
+#include "ui/android/window_android.h"
+#include "ui/display/android/screen_android.h"
+#include "ui/display/display.h"
+
+namespace ui {
+
+static void UpdateDisplayAndroid(
+    JNIEnv* env,
+    const base::android::JavaParamRef<jclass>& jcaller,
+    jint sdkDisplayId,
+    jint physicalWidth,
+    jint physicalHeight,
+    jint width,
+    jint height,
+    jfloat dipScale,
+    jint rotationDegrees,
+    jint bitsPerPixel,
+    jint bitsPerComponent) {
+  gfx::Rect bounds_in_pixels = gfx::Rect(physicalWidth, physicalHeight);
+
+  // Physical width and height might be not supported.
+  if (bounds_in_pixels.IsEmpty())
+    bounds_in_pixels = gfx::Rect(width, height);
+
+  const gfx::Rect bounds_in_dip = gfx::Rect(
+      gfx::ScaleToCeiledSize(bounds_in_pixels.size(), 1.0f / dipScale));
+
+  display::Display display = display::Display(0, bounds_in_dip);
+
+  display.set_device_scale_factor(dipScale);
+  display.SetRotationAsDegree(rotationDegrees);
+  display.set_color_depth(bitsPerPixel);
+  display.set_depth_per_component(bitsPerComponent);
+  display.set_is_monochrome(bitsPerComponent == 0);
+
+  static_cast<display::ScreenAndroid*>(display::Screen::GetScreen())
+      ->UpdateDisplay(sdkDisplayId, display);
+}
+
+static void RemoveDisplayAndroid(
+    JNIEnv* env,
+    const base::android::JavaParamRef<jclass>& jcaller,
+    jint sdkDisplayId) {
+  static_cast<display::ScreenAndroid*>(display::Screen::GetScreen())
+      ->RemoveDisplay(sdkDisplayId);
+}
+
+// static
+bool DisplayAndroid::RegisterDisplayAndroid(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+}  // namespace ui