Removed implementation of CHROMIUM_subscribe_uniform

gpu/command_buffer/service/gpu_switches.cc

Index: gpu/command_buffer/service/gpu_switches.cc
diff --git a/gpu/command_buffer/service/gpu_switches.cc b/gpu/command_buffer/service/gpu_switches.cc
index 389afcb902ced747c69ed704c857eac798c8cadd..829fa8c71a2213c2247d676ab392c76b5df46236 100644
--- a/gpu/command_buffer/service/gpu_switches.cc
+++ b/gpu/command_buffer/service/gpu_switches.cc
@@ -54,10 +54,6 @@ const char kDisableGpuShaderDiskCache[]     = "disable-gpu-shader-disk-cache";
 const char kEnableShareGroupAsyncTextureUpload[] =
     "enable-share-group-async-texture-upload";
 
-// Enable WebGL subscribe uniform extension.
-const char kEnableSubscribeUniformExtension[] =
-    "enable-subscribe-uniform-extension";
-
 // Simulates shared textures when share groups are not available. Not available
 // everywhere.
 const char kEnableThreadedTextureMailboxes[] =