gpu: Add traces to Produce/Consume texture.

gpu/command_buffer/service/gles2_cmd_decoder.cc

Index: gpu/command_buffer/service/gles2_cmd_decoder.cc
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder.cc b/gpu/command_buffer/service/gles2_cmd_decoder.cc
index 1d366022bbbf05cdc616133fdaf42eacefb51552..1408926e35618c50aab5c99c60fe2ba1feeccc22 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.cc
@@ -9963,6 +9963,10 @@ error::Error GLES2DecoderImpl::HandleGenMailboxCHROMIUM(
 
 void GLES2DecoderImpl::DoProduceTextureCHROMIUM(GLenum target,
                                                 const GLbyte* mailbox) {
+  TRACE_EVENT2("gpu", "GLES2DecoderImpl::DoProduceTextureCHROMIUM",
+      "context", GetLogPrefix(),
+      "mailbox[0]", static_cast<unsigned char>(mailbox[0]));
+
   Texture* texture = GetTextureInfoForTarget(target);
   if (!texture) {
     LOCAL_SET_GL_ERROR(
@@ -9998,6 +10002,10 @@ void GLES2DecoderImpl::DoProduceTextureCHROMIUM(GLenum target,
 
 void GLES2DecoderImpl::DoConsumeTextureCHROMIUM(GLenum target,
                                                 const GLbyte* mailbox) {
+  TRACE_EVENT2("gpu", "GLES2DecoderImpl::DoConsumeTextureCHROMIUM",
+      "context", GetLogPrefix(),
+      "mailbox[0]", static_cast<unsigned char>(mailbox[0]));
+
   Texture* texture = GetTextureInfoForTarget(target);
   if (!texture) {
     LOCAL_SET_GL_ERROR(