WebAudioBus needs support for resizing bus to a smaller size
https://bugs.webkit.org/show_bug.cgi?id=99215

Reviewed by Dimitri Glazkov.

Upgrade AudioBus and WebAudioBus to support resizing to a smaller size, once it has been created.
This is useful, for example, when decoding VBR formats and the actual length can't be exactly determined
until the entire file is decoded.

Source/Platform:

* chromium/public/WebAudioBus.h:
(WebAudioBus):

Source/WebCore:

* platform/audio/AudioBus.cpp:
(WebCore::AudioBus::resizeSmaller):
(WebCore):
* platform/audio/AudioBus.h:
(AudioBus):
* platform/audio/AudioChannel.cpp:
(WebCore::AudioChannel::resizeSmaller):
(WebCore):
* platform/audio/AudioChannel.h:
(AudioChannel):
* platform/chromium/support/WebAudioBus.cpp:
(WebKit::WebAudioBus::resizeSmaller):
(WebKit):


git-svn-id: https://svn.webkit.org/repository/webkit/trunk/Source/Platform/chromium/public@131262 268f45cc-cd09-0410-ab3c-d52691b4dbfc