| Index: Source/core/frame/FrameHost.cpp | 
| diff --git a/Source/core/frame/FrameHost.cpp b/Source/core/frame/FrameHost.cpp | 
| index 85734035307a0e1a4e0c6536996a3fce48713819..2b3d4ea8df51b7ff38cc52e4c399d0a3e9411e2b 100644 | 
| --- a/Source/core/frame/FrameHost.cpp | 
| +++ b/Source/core/frame/FrameHost.cpp | 
| @@ -109,6 +109,7 @@ DEFINE_TRACE(FrameHost) | 
| { | 
| visitor->trace(m_page); | 
| visitor->trace(m_topControls); | 
| +    visitor->trace(m_pinchViewport); | 
| visitor->trace(m_eventHandlerRegistry); | 
| visitor->trace(m_consoleMessageStorage); | 
| } | 
|  |