Add GL error usage metrics for glTexImage* APIs

gpu/command_buffer/service/gl_utils.h

Index: gpu/command_buffer/service/gl_utils.h
diff --git a/gpu/command_buffer/service/gl_utils.h b/gpu/command_buffer/service/gl_utils.h
index ade4a3748a7d4880fc2887c8d75ca3103863cee1..9402ecaf3600dd24bdc69f16b2aead02f844113f 100644
--- a/gpu/command_buffer/service/gl_utils.h
+++ b/gpu/command_buffer/service/gl_utils.h
@@ -8,6 +8,8 @@
 #ifndef GPU_COMMAND_BUFFER_SERVICE_GL_UTILS_H_
 #define GPU_COMMAND_BUFFER_SERVICE_GL_UTILS_H_
 
+#include <vector>
+
 #include "build/build_config.h"
 #include "ui/gl/gl_bindings.h"
 
@@ -22,4 +24,12 @@
 #define CHECK_GL_ERROR() void(0)
 #endif  // GL_ERROR_DEBUGGING
 
+namespace gpu {
+namespace gles2 {
+
+std::vector<int> GetAllGLErrors();
+
+} // gles2
+} // gpu
+
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GL_UTILS_H_