Never ignore HTMLLabelElement's click() calls

Source/core/html/HTMLLabelElement.cpp

Index: Source/core/html/HTMLLabelElement.cpp
diff --git a/Source/core/html/HTMLLabelElement.cpp b/Source/core/html/HTMLLabelElement.cpp
index b625e78f6d1c03e85537220ce833a8da5c2d4f3e..fe95b1ba3b016f12383de61b4e76e1ef704d2936 100644
--- a/Source/core/html/HTMLLabelElement.cpp
+++ b/Source/core/html/HTMLLabelElement.cpp
@@ -28,7 +28,7 @@
 #include "HTMLNames.h"
 #include "core/dom/ElementTraversal.h"
 #include "core/editing/FrameSelection.h"
-#include "core/events/Event.h"
+#include "core/events/MouseEvent.h"
 #include "core/frame/LocalFrame.h"
 #include "core/html/FormAssociatedElement.h"
 
@@ -138,9 +138,9 @@ void HTMLLabelElement::defaultEventHandler(Event* evt)
     static bool processingClick = false;
 
     if (evt->type() == EventTypeNames::click && !processingClick) {
-        // If text of label element is selected, do not pass
+        // If the click is not simulated and the text of label element is selected, do not pass

[tkent, 2014/05/21 00:35:49]

nit: Please wrap a comment line in 80-columns.

[Xianzhu, 2014/05/21 15:58:53]

Done.

         // the event to control element.
-        if (document().frame()->selection().selection().isRange())
+        if (!static_cast<MouseEvent*>(evt)->isSimulated() && document().frame()->selection().selection().isRange())

[tkent, 2014/05/21 00:35:49]

Pease use toMouseEvent(evt) instead of static_cast<>.

[Xianzhu, 2014/05/21 15:58:53]

Done.

             return;
 
         RefPtrWillBeRawPtr<HTMLElement> element = control();