Add GL error usage metrics for glTexImage* APIs

gpu/command_buffer/service/texture_manager.cc

Index: gpu/command_buffer/service/texture_manager.cc
diff --git a/gpu/command_buffer/service/texture_manager.cc b/gpu/command_buffer/service/texture_manager.cc
index 1bce4948bab4498d66e1d86e61a57243830a66c7..70fd49f511ca59bc270048296f330a2363f3f98f 100644
--- a/gpu/command_buffer/service/texture_manager.cc
+++ b/gpu/command_buffer/service/texture_manager.cc
@@ -13,6 +13,7 @@
 
 #include "base/bits.h"
 #include "base/lazy_instance.h"
+#include "base/metrics/histogram_macros.h"
 #include "base/strings/stringprintf.h"
 #include "base/thread_task_runner_handle.h"
 #include "base/trace_event/memory_dump_manager.h"
@@ -2262,6 +2263,13 @@ void TextureManager::DoTexImage(
     }
   }
   GLenum error = ERRORSTATE_PEEK_GL_ERROR(error_state, function_name);
+  if (args.command_type == DoTexImageArguments::kTexImage3D) {
+    LOCAL_HISTOGRAM_CUSTOM_ENUMERATION("GPU.Error.TexImage3D", error,

[rkaplow, 2016/01/06 18:40:00]

i think you mean UMA here - otherwise this is only stored locally.

+        GetAllGLErrors());
+  } else {
+    LOCAL_HISTOGRAM_CUSTOM_ENUMERATION("GPU.Error.TexImage2D", error,
+        GetAllGLErrors());
+  }
   if (error == GL_NO_ERROR) {
     SetLevelInfo(
         texture_ref, args.target, args.level, args.internal_format, args.width,