Revert 260177 "By keeping track of transfer buffer usage (both s..."

trunk/src/gpu/command_buffer/common/gles2_cmd_format.h

Index: trunk/src/gpu/command_buffer/common/gles2_cmd_format.h
===================================================================
--- trunk/src/gpu/command_buffer/common/gles2_cmd_format.h	(revision 260192)
+++ trunk/src/gpu/command_buffer/common/gles2_cmd_format.h	(working copy)
@@ -152,25 +152,6 @@
   uint64 result;
 };
 
-struct AsyncUploadSync {
-  void Reset() {
-    base::subtle::Release_Store(&async_upload_token, 0);
-  }
-
-  void SetAsyncUploadToken(uint32 token) {
-    DCHECK_NE(token, 0u);
-    base::subtle::Release_Store(&async_upload_token, token);
-  }
-
-  bool HasAsyncUploadTokenPassed(uint32 token) {
-    DCHECK_NE(token, 0u);
-    uint32_t current_token = base::subtle::Acquire_Load(&async_upload_token);
-    return (current_token - token < 0x80000000);
-  }
-
-  base::subtle::Atomic32 async_upload_token;
-};
-
 COMPILE_ASSERT(sizeof(ProgramInput) == 20, ProgramInput_size_not_20);
 COMPILE_ASSERT(offsetof(ProgramInput, type) == 0,
                OffsetOf_ProgramInput_type_not_0);