Implement debugName() in WebDataConsumerHandle subclasses in content/child/

content/child/shared_memory_data_consumer_handle.cc

Index: content/child/shared_memory_data_consumer_handle.cc
diff --git a/content/child/shared_memory_data_consumer_handle.cc b/content/child/shared_memory_data_consumer_handle.cc
index 24db0590a39ba9ab05ae041478950666de398a2a..71804dda2fcc0e22734e13601fc7e34c21758eb5 100644
--- a/content/child/shared_memory_data_consumer_handle.cc
+++ b/content/child/shared_memory_data_consumer_handle.cc
@@ -365,4 +365,8 @@ void SharedMemoryDataConsumerHandle::UnlockImplicitly() {
   }
 }
 
+const char* SharedMemoryDataConsumerHandle::debugName() const {
+  return "SharedMemoryDataConsumerHandle";
+}
+
 }  // namespace content