https://bugs.webkit.org/show_bug.cgi?id=100894

Reviewed by Kenneth Russell.

Source/WebCore:

The start() method should be able to take 1, 2, or 3 arguments, optionally supporting
offset and duration.  Currently, only 1 and 3 arguments are supported.

Test: webaudio/audiobuffersource-start.html

* Modules/webaudio/AudioBufferSourceNode.cpp:
(WebCore::AudioBufferSourceNode::renderFromBuffer):
(WebCore::AudioBufferSourceNode::startGrain):
(WebCore):
* Modules/webaudio/AudioBufferSourceNode.h:
(AudioBufferSourceNode):
* Modules/webaudio/AudioBufferSourceNode.idl:

LayoutTests:

* webaudio/audiobuffersource-loop-comprehensive.html:
* webaudio/audiobuffersource-start-expected.txt: Added.
* webaudio/audiobuffersource-start.html: Added.
* webaudio/resources/audiobuffersource-testing.js: Added.
(createTestBuffer):
(checkSingleTest):
(checkAllTests):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@133101 268f45cc-cd09-0410-ab3c-d52691b4dbfc