Add dedicated windowToViewport method

content/renderer/render_widget.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 "content/renderer/render_widget.h"
 
 #include <utility>
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
@@ skipping 1756 matching lines @@
     // anchor element can be placed at half pixel.
     gfx::Rect window_rect =
         gfx::ScaleToEnclosedRect(gfx::Rect(*rect), reverse);
     rect->x = window_rect.x();
     rect->y = window_rect.y();
     rect->width = window_rect.width();
     rect->height = window_rect.height();
   }
 }
 
+void RenderWidget::convertWindowToViewport(blink::WebFloatRect* rect) {
+  if (IsUseZoomForDSFEnabled()) {
+    rect->x *= device_scale_factor_;
+    rect->y *= device_scale_factor_;
+    rect->width *= device_scale_factor_;
+    rect->height *= device_scale_factor_;
+  }
+}
+
 void RenderWidget::OnShowImeIfNeeded() {
 #if defined(OS_ANDROID) || defined(USE_AURA)
   UpdateTextInputState(ShowIme::IF_NEEDED, ChangeSource::FROM_NON_IME);
 #endif
 
 // TODO(rouslan): Fix ChromeOS and Windows 8 behavior of autofill popup with
 // virtual keyboard.
 #if !defined(OS_ANDROID)
   FocusChangeComplete();
 #endif
@@ skipping 484 matching lines @@
 void RenderWidget::RegisterVideoHoleFrame(RenderFrameImpl* frame) {
   video_hole_frames_.AddObserver(frame);
 }
 
 void RenderWidget::UnregisterVideoHoleFrame(RenderFrameImpl* frame) {
   video_hole_frames_.RemoveObserver(frame);
 }
 #endif  // defined(VIDEO_HOLE)
 
 }  // namespace content