Add initial GLImage tracing + stubs

ui/gl/gl_image_ref_counted_memory.h

Index: ui/gl/gl_image_ref_counted_memory.h
diff --git a/ui/gl/gl_image_ref_counted_memory.h b/ui/gl/gl_image_ref_counted_memory.h
index 3e39841f5a7ecb23b3c305caf85003337274e2c4..ae2c276d53f598014ba8dc6acdb2603fa571132f 100644
--- a/ui/gl/gl_image_ref_counted_memory.h
+++ b/ui/gl/gl_image_ref_counted_memory.h
@@ -24,6 +24,10 @@ class GL_EXPORT GLImageRefCountedMemory : public GLImageMemory {
   // Overridden from GLImage:
   void Destroy(bool have_context) override;
 
+  void DumpMemory(base::trace_event::ProcessMemoryDump* pmd,
+                  uint64_t process_tracing_id,
+                  const std::string& dump_name) override;
+
  protected:
   ~GLImageRefCountedMemory() override;