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

gpu/command_buffer/client/gles2_implementation.cc

 // Copyright (c) 2012 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.
 
 // A class to emulate GLES2 over command buffers.
 
 #include "gpu/command_buffer/client/gles2_implementation.h"
 
 #include <GLES2/gl2ext.h>
 #include <GLES2/gl2extchromium.h>
@@ skipping 3459 matching lines @@
       length ? std::string(marker, length) : std::string(marker));
 }
 
 void GLES2Implementation::PopGroupMarkerEXT() {
   GPU_CLIENT_SINGLE_THREAD_CHECK();
   GPU_CLIENT_LOG("[" << GetLogPrefix() << "] glPopGroupMarkerEXT()");
   helper_->PopGroupMarkerEXT();
   debug_marker_manager_.PopGroup();
 }
 
-void GLES2Implementation::TraceBeginCHROMIUM(const char* name) {
+void GLES2Implementation::TraceBeginCHROMIUM(
+    const char* category_name, const char* trace_name) {
   GPU_CLIENT_SINGLE_THREAD_CHECK();
   GPU_CLIENT_LOG("[" << GetLogPrefix() << "] glTraceBeginCHROMIUM("
-                 << name << ")");
-  if (current_trace_name_.get()) {
+                 << category_name << ", " << trace_name << ")");
+  if (current_trace_category_.get() || current_trace_name_.get()) {
     SetGLError(GL_INVALID_OPERATION, "glTraceBeginCHROMIUM",
                "trace already running");
     return;
   }
-  TRACE_EVENT_COPY_ASYNC_BEGIN0("gpu", name, this);
-  SetBucketAsCString(kResultBucketId, name);
-  helper_->TraceBeginCHROMIUM(kResultBucketId);
+  TRACE_EVENT_COPY_ASYNC_BEGIN0(category_name, trace_name, this);
+  SetBucketAsCString(kResultBucketId, category_name);
+  SetBucketAsCString(kResultBucketId + 1, category_name);
+  helper_->TraceBeginCHROMIUM(kResultBucketId, kResultBucketId + 1);
   helper_->SetBucketSize(kResultBucketId, 0);
-  current_trace_name_.reset(new std::string(name));
+  helper_->SetBucketSize(kResultBucketId + 1, 0);
+  current_trace_category_.reset(new std::string(category_name));
+  current_trace_name_.reset(new std::string(trace_name));
 }
 
 void GLES2Implementation::TraceEndCHROMIUM() {
   GPU_CLIENT_SINGLE_THREAD_CHECK();
   GPU_CLIENT_LOG("[" << GetLogPrefix() << "] glTraceEndCHROMIUM(" << ")");
-  if (!current_trace_name_.get()) {
+  if (!current_trace_category_.get() || !current_trace_name_.get()) {
     SetGLError(GL_INVALID_OPERATION, "glTraceEndCHROMIUM",
                "missing begin trace");
     return;
   }
   helper_->TraceEndCHROMIUM();
-  TRACE_EVENT_COPY_ASYNC_END0("gpu", current_trace_name_->c_str(), this);
+  TRACE_EVENT_COPY_ASYNC_END0(current_trace_category_->c_str(),
+                              current_trace_name_->c_str(), this);
+  current_trace_category_.reset();
   current_trace_name_.reset();
 }
 
 void* GLES2Implementation::MapBufferCHROMIUM(GLuint target, GLenum access) {
   GPU_CLIENT_SINGLE_THREAD_CHECK();
   GPU_CLIENT_LOG("[" << GetLogPrefix() << "] glMapBufferCHROMIUM("
       << target << ", " << GLES2Util::GetStringEnum(access) << ")");
   switch (target)  {
     case GL_PIXEL_PACK_TRANSFER_BUFFER_CHROMIUM:
       if (access != GL_READ_ONLY) {
@@ skipping 456 matching lines @@
   return true;
 }
 
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.
 #include "gpu/command_buffer/client/gles2_implementation_impl_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu