Revert of 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 585e863f73f904e3527e98f0c2a41d9bdbb1e6b3..af1220672a36a62c4367258cfd3d74e20cda9798 100644
--- a/content/public/common/content_switches.cc
+++ b/content/public/common/content_switches.cc
@@ -185,10 +185,6 @@
 
 // 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";