Disable automatic flushes on compositor contexts.

content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.cc

Index: content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.cc
diff --git a/content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.cc b/content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.cc
index 14fa05a598e2dc7a85372c108265cfc6289bf56a..5abf63d064d87e5c5a783850cbc6449e2e5204db 100644
--- a/content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.cc
+++ b/content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.cc
@@ -343,6 +343,9 @@ bool WebGraphicsContext3DCommandBufferImpl::CreateContext(
   if (!gles2_helper_->Initialize(kCommandBufferSize))
     return false;
 
+  if (attributes_.noAutomaticFlushes)
+    gles2_helper_->SetAutomaticFlushes(false);
+
   // Create a transfer buffer used to copy resources between the renderer
   // process and the GPU process.
   transfer_buffer_ = new gpu::TransferBuffer(gles2_helper_);