Implement HiDPI support in Pepper dev interface

webkit/plugins/ppapi/ppapi_plugin_instance.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 "webkit/plugins/ppapi/ppapi_plugin_instance.h"
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/memory/linked_ptr.h"
@@ skipping 732 matching lines @@
   // consistent since this is given to the plugin, so force everything to 0
   // in the "everything is clipped" case.
   gfx::Rect new_clip;
   if (!clip.IsEmpty())
     new_clip = clip;
 
   ViewData previous_view = view_data_;
 
   view_data_.rect = PP_FromGfxRect(position);
   view_data_.clip_rect = PP_FromGfxRect(clip);
+  view_data_.device_scale = container_->deviceScaleFactor();
+  view_data_.css_scale = container_->pageZoomFactor() *
+                         container_->pageScaleFactor();
 
   if (desired_fullscreen_state_ || view_data_.is_fullscreen) {
     WebElement element = container_->element();
     WebDocument document = element.document();
     bool is_fullscreen_element = (element == document.fullScreenElement());
     if (!view_data_.is_fullscreen && desired_fullscreen_state_ &&
         delegate()->IsInFullscreenMode() && is_fullscreen_element) {
       // Entered fullscreen. Only possible via SetFullscreen().
       view_data_.is_fullscreen = true;
     } else if (view_data_.is_fullscreen && !is_fullscreen_element) {
@@ skipping 1447 matching lines @@
   screen_size_for_fullscreen_ = gfx::Size();
   WebElement element = container_->element();
   element.setAttribute(WebString::fromUTF8(kWidth), width_before_fullscreen_);
   element.setAttribute(WebString::fromUTF8(kHeight), height_before_fullscreen_);
   element.setAttribute(WebString::fromUTF8(kBorder), border_before_fullscreen_);
   element.setAttribute(WebString::fromUTF8(kStyle), style_before_fullscreen_);
 }
 
 }  // namespace ppapi
 }  // namespace webkit