Log both GL and cpu-side memory in GLImage*Memory

ui/gl/gl_image_memory.h

Index: ui/gl/gl_image_memory.h
diff --git a/ui/gl/gl_image_memory.h b/ui/gl/gl_image_memory.h
index be35dd7676b7257e340f5c5d1b26499e876b6e97..10b1a3bc60b911ff5d51d4f4ed72569676961368 100644
--- a/ui/gl/gl_image_memory.h
+++ b/ui/gl/gl_image_memory.h
@@ -46,6 +46,9 @@ class GL_EXPORT GLImageMemory : public GLImage {
                             OverlayTransform transform,
                             const Rect& bounds_rect,
                             const RectF& crop_rect) override;
+
+  // Only dumps the GLTexture portion of the memory usage. Subclasses are
+  // responsible for dumping the CPU-side memory.
   void OnMemoryDump(base::trace_event::ProcessMemoryDump* pmd,
                     uint64_t process_tracing_id,
                     const std::string& dump_name) override;