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

ui/display/android/screen_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 "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