Exposed support for dynamically enabling extensions in command buffer...

gpu/command_buffer/client/gles2_implementation.h

Index: gpu/command_buffer/client/gles2_implementation.h
===================================================================
--- gpu/command_buffer/client/gles2_implementation.h	(revision 68245)
+++ gpu/command_buffer/client/gles2_implementation.h	(working copy)
@@ -379,6 +379,10 @@
   typedef std::map<uint32, std::set<std::string> > GLStringMap;
   GLStringMap gl_strings_;
 
+  // Similar cache for glGetRequestableExtensionsCHROMIUM. We don't
+  // have an enum for this so handle it separately.
+  std::set<std::string> requestable_extensions_set_;
+
   typedef std::map<const void*, MappedBuffer> MappedBufferMap;
   MappedBufferMap mapped_buffers_;