FrameGenerator should receive SurfaceInfo and use it in frame generation

cc/surfaces/surface_factory.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 "cc/surfaces/surface_factory.h"
 
 #include <utility>
 
 #include "base/memory/ptr_util.h"
 #include "base/trace_event/trace_event.h"
@@ skipping 49 matching lines @@
   bool create_new_surface =
       (!current_surface_ ||
        local_frame_id != current_surface_->surface_id().local_frame_id());
   if (!create_new_surface) {
     surface = std::move(current_surface_);
   } else {
     surface = Create(local_frame_id);
     gfx::Size frame_size;
     // CompositorFrames may not be populated with a RenderPass in unit tests.
     if (!frame.render_pass_list.empty())
-      frame_size = frame.render_pass_list[0]->output_rect.size();
+      frame_size = frame.render_pass_list.back()->output_rect.size();
     manager_->SurfaceCreated(SurfaceInfo(
         surface->surface_id(), frame.metadata.device_scale_factor, frame_size));
   }
   surface->QueueFrame(std::move(frame), callback);
   if (!manager_->SurfaceModified(SurfaceId(frame_sink_id_, local_frame_id))) {
     TRACE_EVENT_INSTANT0("cc", "Damage not visible.", TRACE_EVENT_SCOPE_THREAD);
     surface->RunDrawCallbacks();
   }
   if (current_surface_ && create_new_surface) {
     surface->SetPreviousFrameSurface(current_surface_.get());
@@ skipping 45 matching lines @@
   manager_->RegisterSurface(surface.get());
   return surface;
 }
 
 void SurfaceFactory::Destroy(std::unique_ptr<Surface> surface) {
   if (manager_)
     manager_->Destroy(std::move(surface));
 }
 
 }  // namespace cc