Reenable framebusting

third_party/WebKit/Source/core/frame/Frame.cpp

Index: third_party/WebKit/Source/core/frame/Frame.cpp
diff --git a/third_party/WebKit/Source/core/frame/Frame.cpp b/third_party/WebKit/Source/core/frame/Frame.cpp
index b9731fff21bfd2b679f3641b2dc96ffc35b8bb0e..36729ad46393f405d1d0a128f320b3bc3125a1e4 100644
--- a/third_party/WebKit/Source/core/frame/Frame.cpp
+++ b/third_party/WebKit/Source/core/frame/Frame.cpp
@@ -174,8 +174,7 @@ bool Frame::canNavigate(const Frame& targetFrame) {
       canNavigateWithoutFramebusting(targetFrame, errorReason);
   const bool sandboxed = securityContext()->getSandboxFlags() != SandboxNone;
   const bool hasUserGesture =
-      isLocalFrame() ? toLocalFrame(this)->document()->hasReceivedUserGesture()
-                     : false;
+      isLocalFrame() ? toLocalFrame(this)->hasReceivedUserGesture() : false;
 
   // Top navigation in sandbox with or w/o 'allow-top-navigation'.
   if (targetFrame != this && sandboxed && targetFrame == tree().top()) {
@@ -400,6 +399,12 @@ void Frame::didChangeVisibilityState() {
     childFrames[i]->didChangeVisibilityState();
 }
 
+void Frame::setDocumentHasReceivedUserGesture() {
+  m_hasReceivedUserGesture = true;
+  if (Frame* parent = tree().parent())
+    parent->setDocumentHasReceivedUserGesture();
+}
+
 Frame::Frame(FrameClient* client, FrameHost* host, FrameOwner* owner)
     : m_treeNode(this),
       m_host(host),