Updated OSX to blacklist multisampling when multiple monitors are connected

content/browser/gpu/gpu_data_manager_impl.h

Index: content/browser/gpu/gpu_data_manager_impl.h
diff --git a/content/browser/gpu/gpu_data_manager_impl.h b/content/browser/gpu/gpu_data_manager_impl.h
index 34462ff5e8fbd2b0760004b359f15c4c9b7be7d3..baa71e7751c8176e2e56f319e95bc2eab0128776 100644
--- a/content/browser/gpu/gpu_data_manager_impl.h
+++ b/content/browser/gpu/gpu_data_manager_impl.h
@@ -172,6 +172,11 @@ class CONTENT_EXPORT GpuDataManagerImpl
   void AddGpuSwitchCallback(const GpuSwitchCallback& callback);
   void RemoveGpuSwitchCallback(const GpuSwitchCallback& callback);
 
+#if defined(OS_MACOSX)
+  // Number of displays, to be used in GPU feature detection
+  unsigned int display_count_;
+#endif
+
  private:
   struct DomainBlockEntry {
     DomainGuilt last_guilt;