Start sending auxclick instead of click for non-primary buttons

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 6e6be67b75aafd82acf632d13e390460d38d2ae0..4e9e4a4d5458aa722f5c8017882623d2d04d84ac 100644
--- a/third_party/WebKit/Source/core/html/HTMLAnchorElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLAnchorElement.cpp
@@ -455,7 +455,7 @@ bool isEnterKeyKeydownEvent(Event* event)
 bool isLinkClick(Event* event)
 {
     // Allow detail <= 1 so that synthetic clicks work. They may have detail == 0.
-    return event->type() == EventTypeNames::click && (!event->isMouseEvent() || (toMouseEvent(event)->button() != RightButton && toMouseEvent(event)->detail() <= 1));
+    return (event->type() == EventTypeNames::click || event->type() == EventTypeNames::auxclick) && (!event->isMouseEvent() || (toMouseEvent(event)->button() != RightButton && toMouseEvent(event)->detail() <= 1));
 }
 
 bool HTMLAnchorElement::willRespondToMouseClickEvents()