Changed the GPU Tracer so the category names can be customized.

gpu/command_buffer/client/gles2_interface_autogen.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file is auto-generated from
 // gpu/command_buffer/build_gles2_cmd_buffer.py
 // It's formatted by clang-format using chromium coding style:
 //    clang-format -i -style=chromium filename
 // DO NOT EDIT!
 
@@ skipping 514 matching lines @@
                                         const GLuint* valuebuffers) = 0;
 virtual GLboolean IsValuebufferCHROMIUM(GLuint valuebuffer) = 0;
 virtual void BindValuebufferCHROMIUM(GLenum target, GLuint valuebuffer) = 0;
 virtual void SubscribeValueCHROMIUM(GLenum target, GLenum subscription) = 0;
 virtual void PopulateSubscribedValuesCHROMIUM(GLenum target) = 0;
 virtual void UniformValuebufferCHROMIUM(GLint location,
                                         GLenum target,
                                         GLenum subscription) = 0;
 virtual void BindTexImage2DCHROMIUM(GLenum target, GLint imageId) = 0;
 virtual void ReleaseTexImage2DCHROMIUM(GLenum target, GLint imageId) = 0;
-virtual void TraceBeginCHROMIUM(const char* name) = 0;
+virtual void TraceBeginCHROMIUM(const char* category_name,
+                                const char* trace_name) = 0;
 virtual void TraceEndCHROMIUM() = 0;
 virtual void AsyncTexSubImage2DCHROMIUM(GLenum target,
                                         GLint level,
                                         GLint xoffset,
                                         GLint yoffset,
                                         GLsizei width,
                                         GLsizei height,
                                         GLenum format,
                                         GLenum type,
                                         const void* data) = 0;
@@ skipping 24 matching lines @@
                                           GLint bounds_width,
                                           GLint bounds_height,
                                           GLfloat uv_x,
                                           GLfloat uv_y,
                                           GLfloat uv_width,
                                           GLfloat uv_height) = 0;
 virtual void MatrixLoadfCHROMIUM(GLenum matrixMode, const GLfloat* m) = 0;
 virtual void MatrixLoadIdentityCHROMIUM(GLenum matrixMode) = 0;
 virtual void BlendBarrierKHR() = 0;
 #endif  // GPU_COMMAND_BUFFER_CLIENT_GLES2_INTERFACE_AUTOGEN_H_