Revert changes made to ImageResource memory accounting at crrev.com/2337733002

third_party/WebKit/Source/core/fetch/ImageResource.h

Index: third_party/WebKit/Source/core/fetch/ImageResource.h
diff --git a/third_party/WebKit/Source/core/fetch/ImageResource.h b/third_party/WebKit/Source/core/fetch/ImageResource.h
index b0ca7bfe8ff8d9e092ecf6b5fe04700eccc71e67..4211de6df1e7a8f23e05d5682fbd239a2b44e953 100644
--- a/third_party/WebKit/Source/core/fetch/ImageResource.h
+++ b/third_party/WebKit/Source/core/fetch/ImageResource.h
@@ -128,9 +128,6 @@ class CORE_EXPORT ImageResource final
                         std::unique_ptr<WebDataConsumerHandle>) override;
   void finish(double finishTime = 0.0) override;
 
-  void onMemoryDump(WebMemoryDumpLevelOfDetail,
-                    WebProcessMemoryDump*) const override;
-
   // For compatibility, images keep loading even if there are HTTP errors.
   bool shouldIgnoreHTTPStatusCodeErrors() const override { return true; }