https://bugs.webkit.org/show_bug.cgi?id=91743

Reviewed by Adam Barth.

Source/WebCore:

Implement the 'emma' attribute as described in the spec draft at
http://dvcs.w3.org/hg/speech-api/raw-file/tip/speechapi.html

Test: fast/speech/scripted/emma.html

* Modules/speech/SpeechRecognitionResult.cpp:
(WebCore::SpeechRecognitionResult::~SpeechRecognitionResult):
(WebCore):
(WebCore::SpeechRecognitionResult::emma):
* Modules/speech/SpeechRecognitionResult.h:
(WebCore):
(SpeechRecognitionResult):
* Modules/speech/SpeechRecognitionResult.idl:
* WebCore.gypi:
* bindings/v8/custom/V8SpeechRecognitionResultCustom.cpp:
(WebCore):
(WebCore::V8SpeechRecognitionResult::visitDOMWrapper):
  We need to add an implicit reference from the result object to the
  emma object to keep the latters DOM tree alive across
  garbage-collection.

LayoutTests:

Add layout test for the SpeechRecognitionResult.emma attribute.

* fast/speech/scripted/emma.html: Added.
* fast/speech/scripted/emma-expected.txt: Added.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@123461 268f45cc-cd09-0410-ab3c-d52691b4dbfc