Add DeviceDisplayInfo getter in WindowAndroid.

ui/snapshot/snapshot_android.cc

Index: ui/snapshot/snapshot_android.cc
diff --git a/ui/snapshot/snapshot_android.cc b/ui/snapshot/snapshot_android.cc
index a8200be708df7f46de0ffb94bba8dba36153c850..c4616c8b84ffda83245bf9a54a11a0f83ce4a638 100644
--- a/ui/snapshot/snapshot_android.cc
+++ b/ui/snapshot/snapshot_android.cc
@@ -10,6 +10,7 @@
 #include "ui/android/view_android.h"
 #include "ui/android/window_android.h"
 #include "ui/android/window_android_compositor.h"
+#include "ui/gfx/android/device_display_info.h"
 #include "ui/gfx/display.h"
 #include "ui/gfx/geometry/point_conversions.h"
 #include "ui/gfx/geometry/rect_conversions.h"
@@ -39,9 +40,11 @@ static void MakeAsyncCopyRequest(
   scoped_ptr<cc::CopyOutputRequest> request =
       cc::CopyOutputRequest::CreateBitmapRequest(callback);
 
-  const gfx::Display& display =
-      gfx::Screen::GetNativeScreen()->GetPrimaryDisplay();
-  float device_scale_factor = display.device_scale_factor();
+  float device_scale_factor =
+      gfx::Display::HasForceDeviceScaleFactor()
+          ? gfx::Display::GetForcedDeviceScaleFactor()
+          : window->GetDeviceDisplayInfo().GetDIPScale();
+
   gfx::Rect source_rect_in_pixel =
       gfx::ScaleToEnclosingRect(source_rect, device_scale_factor);