Cross-process frames should be notified of device scale factor changes.

content/browser/devtools/protocol/page_handler.cc

 // Copyright 2014 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/browser/devtools/protocol/page_handler.h"
 
 #include <string>
 
 #include "base/base64.h"
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/threading/worker_pool.h"
 #include "content/browser/devtools/page_navigation_throttle.h"
 #include "content/browser/devtools/protocol/color_picker.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_view_base.h"
 #include "content/browser/web_contents/web_contents_impl.h"
+#include "content/browser/web_contents/web_contents_view.h"
 #include "content/common/view_messages.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/javascript_dialog_manager.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/navigation_handle.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_types.h"
 #include "content/public/browser/storage_partition.h"
 #include "content/public/browser/web_contents_delegate.h"
@@ skipping 432 matching lines @@
   // TODO(vkuzkokov): do not use previous frame metadata.
   cc::CompositorFrameMetadata& metadata = last_compositor_frame_metadata_;
 
   gfx::SizeF viewport_size_dip = gfx::ScaleSize(
       metadata.scrollable_viewport_size, metadata.page_scale_factor);
   gfx::SizeF screen_size_dip =
       gfx::ScaleSize(gfx::SizeF(view->GetPhysicalBackingSize()),
                      1 / metadata.device_scale_factor);
 
   blink::WebScreenInfo screen_info;
-  view->GetScreenInfo(&screen_info);
+  GetWebContents()->GetView()->GetScreenInfo(&screen_info);
   double device_scale_factor = screen_info.deviceScaleFactor;
   double scale = 1;
 
   if (screencast_max_width_ > 0) {
     double max_width_dip = screencast_max_width_ / device_scale_factor;
     scale = std::min(scale, max_width_dip / screen_size_dip.width());
   }
   if (screencast_max_height_ > 0) {
     double max_height_dip = screencast_max_height_ / device_scale_factor;
     scale = std::min(scale, max_height_dip / screen_size_dip.height());
@@ skipping 94 matching lines @@
 
 void PageHandler::OnColorPicked(int r, int g, int b, int a) {
   scoped_refptr<dom::RGBA> color =
       dom::RGBA::Create()->set_r(r)->set_g(g)->set_b(b)->set_a(a);
   client_->ColorPicked(ColorPickedParams::Create()->set_color(color));
 }
 
 }  // namespace page
 }  // namespace devtools
 }  // namespace content