Re-land: content: Enable native GpuMemoryBuffers by default on MacOSX.

content/public/common/content_switches.cc

Index: content/public/common/content_switches.cc
diff --git a/content/public/common/content_switches.cc b/content/public/common/content_switches.cc
index af1220672a36a62c4367258cfd3d74e20cda9798..585e863f73f904e3527e98f0c2a41d9bdbb1e6b3 100644
--- a/content/public/common/content_switches.cc
+++ b/content/public/common/content_switches.cc
@@ -186,6 +186,10 @@ const char kDisableMediaSource[]            = "disable-media-source";
 // Disables usage of the namespace sandbox.
 const char kDisableNamespaceSandbox[]       = "disable-namespace-sandbox";
 
+// Disables native GPU memory buffer support.
+const char kDisableNativeGpuMemoryBuffers[] =
+    "disable-native-gpu-memory-buffers";
+
 // Disables the Web Notification and the Push APIs.
 const char kDisableNotifications[]          = "disable-notifications";