GLImage::OnMemoryDump Stubs + Some Impls

ui/gl/gl_image_ref_counted_memory.cc

Index: ui/gl/gl_image_ref_counted_memory.cc
diff --git a/ui/gl/gl_image_ref_counted_memory.cc b/ui/gl/gl_image_ref_counted_memory.cc
index f01c7008a1d6f4c1ac32f0378944c07bfbaf9158..2bfa667f15de2bc08b5621957cc5fef0cc51bc03 100644
--- a/ui/gl/gl_image_ref_counted_memory.cc
+++ b/ui/gl/gl_image_ref_counted_memory.cc
@@ -34,4 +34,17 @@ void GLImageRefCountedMemory::Destroy(bool have_context) {
   ref_counted_memory_ = NULL;
 }
 
+void GLImageRefCountedMemory::OnMemoryDump(
+    base::trace_event::ProcessMemoryDump* pmd,
+    uint64_t process_tracing_id,
+    const std::string& dump_name) {
+  if (ref_counted_memory_) {
+    base::trace_event::MemoryAllocatorDump* dump =
+        pmd->CreateAllocatorDump(dump_name);
+    dump->AddScalar(base::trace_event::MemoryAllocatorDump::kNameSize,
+                    base::trace_event::MemoryAllocatorDump::kUnitsBytes,
+                    static_cast<uint64_t>(ref_counted_memory_->size()));
+  }
+}
+
 }  // namespace gfx