Sharing of SharedArrayBuffer via PostMessage transfer

Source/platform/graphics/ImageBuffer.cpp

Index: Source/platform/graphics/ImageBuffer.cpp
diff --git a/Source/platform/graphics/ImageBuffer.cpp b/Source/platform/graphics/ImageBuffer.cpp
index ec447d10ffa1539719c1f2a90d9c428ec9e4b241..4a0fc0ade9dbb0cb57954293f3a3d4390643f220 100644
--- a/Source/platform/graphics/ImageBuffer.cpp
+++ b/Source/platform/graphics/ImageBuffer.cpp
@@ -296,7 +296,7 @@ bool ImageBuffer::getImageData(Multiply multiplied, const IntRect& rect, WTF::Ar
         return false;
 
     if (!isSurfaceValid()) {
-        WTF::ArrayBufferContents result(rect.width() * rect.height(), 4, WTF::ArrayBufferContents::ZeroInitialize);
+        WTF::ArrayBufferContents result(rect.width() * rect.height(), 4, WTF::ArrayBufferContents::NotShared, WTF::ArrayBufferContents::ZeroInitialize);
         result.transfer(contents);
         return true;
     }
@@ -308,6 +308,7 @@ bool ImageBuffer::getImageData(Multiply multiplied, const IntRect& rect, WTF::Ar
         || rect.maxY() > m_surface->size().height();
     WTF::ArrayBufferContents result(
         rect.width() * rect.height(), 4,
+        WTF::ArrayBufferContents::NotShared,
         hasStrayArea
         ? WTF::ArrayBufferContents::ZeroInitialize
         : WTF::ArrayBufferContents::DontInitialize);