Reenable framebusting deprecation, change it to allow navigation if iframe has ever had a user gestu

third_party/WebKit/Source/core/dom/Document.cpp

Index: third_party/WebKit/Source/core/dom/Document.cpp
diff --git a/third_party/WebKit/Source/core/dom/Document.cpp b/third_party/WebKit/Source/core/dom/Document.cpp
index 5606598fa859438ab1a364163af1311c9c551b49..333bb5da9caa62fe6921a40f72b008c921b710c9 100644
--- a/third_party/WebKit/Source/core/dom/Document.cpp
+++ b/third_party/WebKit/Source/core/dom/Document.cpp
@@ -465,6 +465,7 @@ Document::Document(const DocumentInit& initializer,
       m_hasXMLDeclaration(0),
       m_designMode(false),
       m_isRunningExecCommand(false),
+      m_hasReceivedUserGesture(false),
       m_hasAnnotatedRegions(false),
       m_annotatedRegionsDirty(false),
       m_useSecureKeyboardEntryWhenActive(false),
@@ -3386,6 +3387,10 @@ MouseEventWithHitTestResults Document::performMouseEventHitTest(
     const LayoutPoint& documentPoint,
     const PlatformMouseEvent& event) {
   DCHECK(layoutViewItem().isNull() || layoutViewItem().isLayoutView());
+  // TODO(japhet): UserGestureIndicator should setHasReceivedUserGesture()
+  // on the Document.
+  if (UserGestureIndicator::processingUserGesture())
+    m_hasReceivedUserGesture = true;
 
   // LayoutView::hitTest causes a layout, and we don't want to hit that until
   // the first layout because until then, there is nothing shown on the screen -