Implement GL_EXT_debug_marker

gpu/command_buffer/client/gles2_implementation.h

Index: gpu/command_buffer/client/gles2_implementation.h
diff --git a/gpu/command_buffer/client/gles2_implementation.h b/gpu/command_buffer/client/gles2_implementation.h
index a5d5e6a7879468ae1d1d68c9d81cd8f7e165fd7a..10bf55dcc0eb55521bdb714c7a4429e04116f26e 100644
--- a/gpu/command_buffer/client/gles2_implementation.h
+++ b/gpu/command_buffer/client/gles2_implementation.h
@@ -13,6 +13,7 @@
 #include <string>
 #include <vector>
 
+#include "../common/debug_marker_manager.h"
 #include "../common/gles2_cmd_utils.h"
 #include "../common/scoped_ptr.h"
 #include "../client/ref_counted.h"
@@ -482,10 +483,14 @@ class GLES2_IMPL_EXPORT GLES2Implementation {
   // for error checking.
   bool MustBeContextLost();
 
+  const std::string& GetLogPrefix() const;
+
   GLES2Util util_;
   GLES2CmdHelper* helper_;
   TransferBufferInterface* transfer_buffer_;
   std::string last_error_;
+  DebugMarkerManager debug_marker_manager_;
+  std::string this_in_hex_;
 
   std::queue<int32> swap_buffers_tokens_;
   std::queue<int32> rate_limit_tokens_;