cc: Remove GLC macro

cc/output/gl_renderer.h

Index: cc/output/gl_renderer.h
diff --git a/cc/output/gl_renderer.h b/cc/output/gl_renderer.h
index 16962f2ac18f673f725d3c5b4deb3e43dc334374..8dcabf9f4d042ba9fed5ca46e86f29c4f27bec65 100644
--- a/cc/output/gl_renderer.h
+++ b/cc/output/gl_renderer.h
@@ -68,11 +68,6 @@ class CC_EXPORT GLRenderer : public DirectRenderer {
 
   virtual bool IsContextLost();
 
-  static void DebugGLCall(gpu::gles2::GLES2Interface* gl,
-                          const char* command,
-                          const char* file,
-                          int line);
-
  protected:
   GLRenderer(RendererClient* client,
              const RendererSettings* settings,
@@ -517,18 +512,6 @@ class CC_EXPORT GLRenderer : public DirectRenderer {
   DISALLOW_COPY_AND_ASSIGN(GLRenderer);
 };
 
-// Setting DEBUG_GL_CALLS to 1 will call glGetError() after almost every GL
-// call made by the compositor. Useful for debugging rendering issues but
-// will significantly degrade performance.
-#define DEBUG_GL_CALLS 0
-
-#if DEBUG_GL_CALLS && !defined(NDEBUG)
-#define GLC(context, x)                                                        \
-  (x, GLRenderer::DebugGLCall(&* context, #x, __FILE__, __LINE__))
-#else
-#define GLC(context, x) (x)
-#endif
-
 }  // namespace cc
 
 #endif  // CC_OUTPUT_GL_RENDERER_H_