WIP GPU scheduler + delayed activation / tile draw

content/browser/compositor/gpu_process_transport_factory.cc

Index: content/browser/compositor/gpu_process_transport_factory.cc
diff --git a/content/browser/compositor/gpu_process_transport_factory.cc b/content/browser/compositor/gpu_process_transport_factory.cc
index 7d1cf0c2d283a6620d1de210bc8fc8348d66ee4d..cb8151ba1cf1c7ccc4fcfbdf2abe57abb8bb47e3 100644
--- a/content/browser/compositor/gpu_process_transport_factory.cc
+++ b/content/browser/compositor/gpu_process_transport_factory.cc
@@ -145,7 +145,7 @@ scoped_refptr<content::ContextProviderCommandBuffer> CreateContextCommon(
   GURL url("chrome://gpu/GpuProcessTransportFactory::CreateContextCommon");
   return make_scoped_refptr(new content::ContextProviderCommandBuffer(
       std::move(gpu_channel_host), gpu::GPU_STREAM_DEFAULT,
-      gpu::GpuStreamPriority::NORMAL, surface_handle, url, automatic_flushes,
+      gpu::GpuStreamPriority::REAL_TIME, surface_handle, url, automatic_flushes,
       support_locking, gpu::SharedMemoryLimits(), attributes,
       shared_context_provider, type));
 }