Added support for TimeStamp queries using QueryCounterEXT.

gpu/command_buffer/cmd_buffer_functions.txt

Index: gpu/command_buffer/cmd_buffer_functions.txt
diff --git a/gpu/command_buffer/cmd_buffer_functions.txt b/gpu/command_buffer/cmd_buffer_functions.txt
index abaf27beb9487247e89b8a9d3f5533f1b5fa248f..cf88d38c4959c256db430d6cba47119fa8c34c0f 100644
--- a/gpu/command_buffer/cmd_buffer_functions.txt
+++ b/gpu/command_buffer/cmd_buffer_functions.txt
@@ -231,6 +231,7 @@ GL_APICALL void         GL_APIENTRY glFramebufferTexture2DMultisampleEXT (GLenum
 GL_APICALL void         GL_APIENTRY glTexStorage2DEXT (GLenumTextureBindTarget target, GLsizei levels, GLenumTextureInternalFormatStorage internalFormat, GLsizei width, GLsizei height);
 GL_APICALL void         GL_APIENTRY glGenQueriesEXT (GLsizeiNotNegative n, GLuint* queries);
 GL_APICALL void         GL_APIENTRY glDeleteQueriesEXT (GLsizeiNotNegative n, const GLuint* queries);
+GL_APICALL void         GL_APIENTRY glQueryCounterEXT (GLidQuery id, GLenumQueryTarget target);
 GL_APICALL GLboolean    GL_APIENTRY glIsQueryEXT (GLidQuery id);
 GL_APICALL void         GL_APIENTRY glBeginQueryEXT (GLenumQueryTarget target, GLidQuery id);
 GL_APICALL void         GL_APIENTRY glBeginTransformFeedback (GLenumTransformFeedbackPrimitiveMode primitivemode);