Allow Windows to use system Vsync if only one window is swapping

content/common/gpu/image_transport_surface.cc

Index: content/common/gpu/image_transport_surface.cc
diff --git a/content/common/gpu/image_transport_surface.cc b/content/common/gpu/image_transport_surface.cc
index 922a4981c529bb6169d4144973cff85a219c49f7..ad31a8e301cde4414bf158c12729a36bd621ea7d 100644
--- a/content/common/gpu/image_transport_surface.cc
+++ b/content/common/gpu/image_transport_surface.cc
@@ -19,10 +19,6 @@
 #include "ui/gl/gl_implementation.h"
 #include "ui/gl/gl_switches.h"
 
-#if defined(OS_WIN)
-#include "ui/base/win/shell.h"
-#endif
-
 namespace content {
 
 ImageTransportSurface::ImageTransportSurface() {}
@@ -153,14 +149,6 @@ bool ImageTransportHelper::MakeCurrent() {
 }
 
 void ImageTransportHelper::SetSwapInterval(gfx::GLContext* context) {
-#if defined(OS_WIN)
-  // If Aero Glass is enabled, then the renderer will handle ratelimiting and
-  // there's no tearing, so waiting for vsync is unnecessary.
-  if (ui::win::IsAeroGlassEnabled()) {
-    context->SetSwapInterval(0);
-    return;
-  }
-#endif
   if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kDisableGpuVsync))
     context->SetSwapInterval(0);
   else