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

ui/display/android/screen_android.cc

Index: ui/display/android/screen_android.cc
diff --git a/ui/display/android/screen_android.cc b/ui/display/android/screen_android.cc
deleted file mode 100644
index 39c02d07af808c6bb296f00868839f686ff0c3fe..0000000000000000000000000000000000000000
--- a/ui/display/android/screen_android.cc
+++ /dev/null
@@ -1,65 +0,0 @@
-// 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 "base/logging.h"
-#include "base/macros.h"
-#include "ui/display/display.h"
-#include "ui/display/screen_base.h"
-#include "ui/gfx/android/device_display_info.h"
-#include "ui/gfx/geometry/size_conversions.h"
-
-namespace display {
-
-class ScreenAndroid : public ScreenBase {
- public:
-  ScreenAndroid() {
-    gfx::DeviceDisplayInfo device_info;
-    const float device_scale_factor = device_info.GetDIPScale();
-    // Note: GetPhysicalDisplayWidth/Height() does not subtract window
-    // decorations etc. Use it instead of GetDisplayWidth/Height() when
-    // available.
-    const gfx::Rect bounds_in_pixels =
-        gfx::Rect(device_info.GetPhysicalDisplayWidth()
-                      ? device_info.GetPhysicalDisplayWidth()
-                      : device_info.GetDisplayWidth(),
-                  device_info.GetPhysicalDisplayHeight()
-                      ? device_info.GetPhysicalDisplayHeight()
-                      : device_info.GetDisplayHeight());
-    const gfx::Rect bounds_in_dip = gfx::Rect(gfx::ScaleToCeiledSize(
-        bounds_in_pixels.size(), 1.0f / device_scale_factor));
-    Display display(0, bounds_in_dip);
-    if (!Display::HasForceDeviceScaleFactor())
-      display.set_device_scale_factor(device_scale_factor);
-    display.SetRotationAsDegree(device_info.GetRotationDegrees());
-    display.set_color_depth(device_info.GetBitsPerPixel());
-    display.set_depth_per_component(device_info.GetBitsPerComponent());
-    display.set_is_monochrome(device_info.GetBitsPerComponent() == 0);
-    ProcessDisplayChanged(display, true /* is_primary */);
-  }
-
-  gfx::Point GetCursorScreenPoint() override { return gfx::Point(); }
-
-  bool IsWindowUnderCursor(gfx::NativeWindow window) override {
-    NOTIMPLEMENTED();
-    return false;
-  }
-
-  gfx::NativeWindow GetWindowAtScreenPoint(const gfx::Point& point) override {
-    NOTIMPLEMENTED();
-    return NULL;
-  }
-
-  Display GetDisplayNearestWindow(gfx::NativeView view) const override {
-    return GetPrimaryDisplay();
-  }
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(ScreenAndroid);
-};
-
-Screen* CreateNativeScreen() {
-  return new ScreenAndroid;
-}
-
-}  // namespace display