Increase priority of GPU presenter threads

ui/gfx/surface/accelerated_surface_win.cc

Index: ui/gfx/surface/accelerated_surface_win.cc
diff --git a/ui/gfx/surface/accelerated_surface_win.cc b/ui/gfx/surface/accelerated_surface_win.cc
index 45fdf482c3c989f833ae6ffd0242dd8ab5944eb3..87cfaaa2b96ecfbf95e3e660f092a626f9ace6fa 100644
--- a/ui/gfx/surface/accelerated_surface_win.cc
+++ b/ui/gfx/surface/accelerated_surface_win.cc
@@ -323,6 +323,11 @@ void AcceleratedPresenter::DoInitialize() {
   if (FAILED(hr))
     return;
 
+  // Increase the GPU priority of this thread, so the StretchRect to the
+  // backbuffer doesn't have to wait for expensive commands in the GPU process
+  // to execute.
+  device_->SetGPUThreadPriority(7);

[apatrick_chromium, 2012/03/06 22:20:31]

This isn't going to give this thread higher GPU priority than the DWM, thereby
bricking lots of machines is it? :) Does 1 work?

+
   hr = device_->CreateQuery(D3DQUERYTYPE_EVENT, query_.Receive());
   if (FAILED(hr)) {
     device_ = NULL;