Fix for mouse capture and release on ClearButtonElement

Source/core/html/shadow/ClearButtonElement.cpp

Index: Source/core/html/shadow/ClearButtonElement.cpp
diff --git a/Source/core/html/shadow/ClearButtonElement.cpp b/Source/core/html/shadow/ClearButtonElement.cpp
index 71e922a54bc9145cd8b301d2c2ee86119b16c023..d753bb8db48e35a3a21de03c1b6063308a2f7270 100644
--- a/Source/core/html/shadow/ClearButtonElement.cpp
+++ b/Source/core/html/shadow/ClearButtonElement.cpp
@@ -106,6 +106,14 @@ void ClearButtonElement::defaultEventHandler(Event* event)
                 event->setDefaultHandled();
             }
         }
+    } else if (event->type() == EventTypeNames::mousemove) {

[Habib Virji, 2014/09/23 11:09:06]

As suggested by tkent. Please use click instead of mouse events.

Also add tests for your changes.

+        if (m_capturing) {
+            if (LocalFrame* frame = document().frame()) {
+                frame->eventHandler().setCapturingMouseEventsNode(nullptr);
+                m_capturing = false;
+            }
+        }
+        event->setDefaultHandled();
     }
 
     if (!event->defaultHandled())