Compute damage rect for Cast video compositing

content/browser/compositor/gpu_process_transport_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 "content/browser/compositor/gpu_process_transport_factory.h"
 
 #include <string>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 218 matching lines @@
   if (command_line->HasSwitch(switches::kEnableHardwareOverlays)) {
     std::string enable_overlay_flag =
         command_line->GetSwitchValueASCII(switches::kEnableHardwareOverlays);
     std::unique_ptr<ui::OverlayCandidatesOzone> overlay_candidates =
         ui::OzonePlatform::GetInstance()
             ->GetOverlayManager()
             ->CreateOverlayCandidates(widget);
     validator.reset(
         new display_compositor::CompositorOverlayCandidateValidatorOzone(
             std::move(overlay_candidates),
-            enable_overlay_flag == "single-fullscreen"));
+            enable_overlay_flag == "single-fullscreen",
+            enable_overlay_flag == "cast-underlay"));
   }
 #elif defined(OS_MACOSX)
   // Overlays are only supported through the remote layer API.
   if (ui::RemoteLayerAPISupported()) {
     static bool overlays_disabled_at_command_line =
         IsCALayersDisabledFromCommandLine();
     const bool ca_layers_disabled =
         overlays_disabled_at_command_line ||
         GpuDataManagerImpl::GetInstance()->IsDriverBugWorkaroundActive(
             gpu::DISABLE_OVERLAY_CA_LAYERS);
@@ skipping 630 matching lines @@
       shared_vulkan_context_provider_ =
           cc::VulkanInProcessContextProvider::Create();
     }
 
     shared_vulkan_context_provider_initialized_ = true;
   }
   return shared_vulkan_context_provider_;
 }
 
 }  // namespace content