remove memoryinstrumentation

Source/core/platform/graphics/ImageSource.cpp

Index: Source/core/platform/graphics/ImageSource.cpp
diff --git a/Source/core/platform/graphics/ImageSource.cpp b/Source/core/platform/graphics/ImageSource.cpp
index b02499d65d57411f430bf3be5c9fe8b3c7e386a8..8ef58b0e933e2929b3a6328c8af93c40dde0b52e 100644
--- a/Source/core/platform/graphics/ImageSource.cpp
+++ b/Source/core/platform/graphics/ImageSource.cpp
@@ -33,7 +33,6 @@
 
 #include "ImageOrientation.h"
 #include "NotImplemented.h"
-#include "PlatformMemoryInstrumentation.h"
 
 #include "DeferredImageDecoder.h"
 
@@ -203,10 +202,4 @@ unsigned ImageSource::frameBytesAtIndex(size_t index) const
     return m_decoder->frameBytesAtIndex(index);
 }
 
-void ImageSource::reportMemoryUsage(MemoryObjectInfo* memoryObjectInfo) const
-{
-    MemoryClassInfo info(memoryObjectInfo, this, PlatformMemoryTypes::Image);
-    info.addMember(m_decoder, "decoder");
-}
-
 }