Only allow link clicks on single click.

third_party/WebKit/Source/core/html/HTMLAnchorElement.cpp

Index: third_party/WebKit/Source/core/html/HTMLAnchorElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLAnchorElement.cpp b/third_party/WebKit/Source/core/html/HTMLAnchorElement.cpp
index e7fc3dcbed2fa990f66309af0a2e7c3123fe718c..3d0920d52b28497bc3294539d351a2484a24e770 100644
--- a/third_party/WebKit/Source/core/html/HTMLAnchorElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLAnchorElement.cpp
@@ -373,7 +373,8 @@ bool isEnterKeyKeydownEvent(Event* event)
 
 bool isLinkClick(Event* event)
 {
-    return event->type() == EventTypeNames::click && (!event->isMouseEvent() || toMouseEvent(event)->button() != RightButton);
+    // Allow detail <= 1 so that synthetic clicks work. They have detail == 0.

[Rick Byers, 2016/05/25 17:25:14]

nit: "they may have", right?  Presumably JS should be passing detail:1 to the
MouseEvent constructor.

[dtapuska, 2016/05/25 19:25:47]

Done.

+    return event->type() == EventTypeNames::click && (!event->isMouseEvent() || (toMouseEvent(event)->button() != RightButton && toMouseEvent(event)->detail() <= 1));
 }
 
 bool HTMLAnchorElement::willRespondToMouseClickEvents()