Make delegated software renderer work on Mac

content/browser/compositor/software_output_device_ozone.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/compositor/software_output_device_ozone.h"
 #include "third_party/skia/include/core/SkDevice.h"
 #include "ui/compositor/compositor.h"
 #include "ui/gfx/ozone/surface_factory_ozone.h"
 #include "ui/gfx/ozone/surface_ozone_canvas.h"
 #include "ui/gfx/skia_util.h"
@@ skipping 12 matching lines @@
 
   if (!surface_ozone_)
     LOG(FATAL) << "Failed to initialize canvas";
 
   vsync_provider_ = surface_ozone_->CreateVSyncProvider();
 }
 
 SoftwareOutputDeviceOzone::~SoftwareOutputDeviceOzone() {
 }
 
-void SoftwareOutputDeviceOzone::Resize(const gfx::Size& viewport_size) {
+void SoftwareOutputDeviceOzone::Resize(const gfx::Size& viewport_pixel_size,
+                                       float scale_factor) {
+  scale_factor_ = scale_factor;
+
   if (viewport_size_ == viewport_size)
     return;
 
   viewport_size_ = viewport_size;
 
   surface_ozone_->ResizeCanvas(viewport_size_);
 }
 
 SkCanvas* SoftwareOutputDeviceOzone::BeginPaint(const gfx::Rect& damage_rect) {
   DCHECK(gfx::Rect(viewport_size_).Contains(damage_rect));
 
   // Get canvas for next frame.
   canvas_ = surface_ozone_->GetCanvas();
 
   return SoftwareOutputDevice::BeginPaint(damage_rect);
 }
 
 void SoftwareOutputDeviceOzone::EndPaint(cc::SoftwareFrameData* frame_data) {
   SoftwareOutputDevice::EndPaint(frame_data);
 
   surface_ozone_->PresentCanvas(damage_rect_);
 }
 
 }  // namespace content