Fix selection of label having control element.

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 65d71604ee8999d090a814c33155be190de33774..9dd855b64d1279d39ba3b612d288938f91175e61 100644
--- a/Source/core/html/HTMLLabelElement.cpp
+++ b/Source/core/html/HTMLLabelElement.cpp
@@ -27,7 +27,9 @@
 
 #include "HTMLNames.h"
 #include "core/dom/ElementTraversal.h"
+#include "core/editing/FrameSelection.h"
 #include "core/events/Event.h"
+#include "core/frame/LocalFrame.h"
 #include "core/html/FormAssociatedElement.h"
 
 namespace WebCore {
@@ -136,6 +138,11 @@ 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

[tkent, 2014/04/29 23:36:09]

Is this behavior compatible with other browsers?

[deepak.sa, 2014/05/02 06:18:46]

Firefox allows the text of label associated with input element to be selected
either by double clicking or by dragging the mouse over text.

In I.E. and Safari, label text is not getting selected. 

+        // the event to control element.
+        if (document().frame()->selection().selection().isRange())
+            return;
+
         RefPtr<HTMLElement> element = control();
 
         // If we can't find a control or if the control received the click