Hookup the GPUTrace events.

gpu/command_buffer/service/gles2_cmd_decoder_unittest_3.cc

Index: gpu/command_buffer/service/gles2_cmd_decoder_unittest_3.cc
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder_unittest_3.cc b/gpu/command_buffer/service/gles2_cmd_decoder_unittest_3.cc
index 1f181d7b7c45ef49f542e09706bf8d37ead09df9..08e388889660d1bcfdab10f6b184f291ee90ab2b 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder_unittest_3.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder_unittest_3.cc
@@ -4,6 +4,7 @@
 
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 
+#include "base/message_loop.h"
 #include "gpu/command_buffer/common/gles2_cmd_format.h"
 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder_unittest_base.h"
@@ -43,6 +44,8 @@ TEST_F(GLES2DecoderTest3, TraceBeginCHROMIUM) {
 }
 
 TEST_F(GLES2DecoderTest3, TraceEndCHROMIUM) {
+  MessageLoop loop(MessageLoop::TYPE_DEFAULT);
+
   // Test end fails if no begin.
   TraceEndCHROMIUM end_cmd;
   end_cmd.Init();