Compute the popup location/size correctly when use-zoom-for-dsf is enabled.

components/plugins/renderer/webview_plugin.cc

 // Copyright 2013 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 "components/plugins/renderer/webview_plugin.h"
 
 #include "base/message_loop/message_loop.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/numerics/safe_conversions.h"
 #include "content/public/common/web_preferences.h"
@@ skipping 245 matching lines @@
 
 void WebViewPlugin::startDragging(WebLocalFrame*,
                                   const WebDragData&,
                                   WebDragOperationsMask,
                                   const WebImage&,
                                   const WebPoint&) {
   // Immediately stop dragging.
   web_view_->dragSourceSystemDragEnded();
 }
 
+void WebViewPlugin::convertViewportToScreen(blink::WebRect* rect) {
+  // TODO(oshima): Figure out what to do.
+  NOTIMPLEMENTED();
+}
+
 bool WebViewPlugin::allowsBrokenNullLayerTreeView() const {
   return true;
 }
 
 void WebViewPlugin::didInvalidateRect(const WebRect& rect) {
   if (container_)
     container_->invalidateRect(rect);
 }
 
 void WebViewPlugin::didUpdateLayoutSize(const WebSize&) {
@@ skipping 36 matching lines @@
   // By default RenderViewObservers are destroyed along with the RenderView.
   // WebViewPlugin has a custom destruction mechanism, so we disable this.
 }
 
 void WebViewPlugin::OnZoomLevelChanged() {
   if (container_) {
     web_view_->setZoomLevel(
       blink::WebView::zoomFactorToZoomLevel(container_->pageZoomFactor()));
   }
 }