https://bugs.webkit.org/show_bug.cgi?id=74273

Patch by Raymond Toy <rtoy@google.com> on 2012-02-02
Reviewed by Kenneth Russell.

Source/WebCore:

Tests: webaudio/distance-exponential.html
       webaudio/distance-inverse.html
       webaudio/distance-linear.html

* webaudio/AudioPannerNode.h: Define enum for the new constants
for the distance models.
* webaudio/AudioPannerNode.idl: Define matching constants for the
distance models.

LayoutTests:

* webaudio/distance-exponential-expected.txt: Added.
* webaudio/distance-exponential.html: Added.
* webaudio/distance-inverse-expected.txt: Added.
* webaudio/distance-inverse.html: Added.
* webaudio/distance-linear-expected.txt: Added.
* webaudio/distance-linear.html: Added.
* webaudio/resources/distance-model-testing.js: Added.
(createImpulseBuffer):
(linearDistance):
(exponentialDistance):
(inverseDistance):
(createGraph):
(startSources):
(equalPowerGain):
(checkDistanceResult.return.renderedBuffer):
(checkDistanceResult):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@106580 268f45cc-cd09-0410-ab3c-d52691b4dbfc