ConvolverNode.buffer sample rate must match AudioContext rate

Throw an exception as required when the sample rate of the convolver
node buffer does not match the sample rate of the audio context.

Added test for this case.

BUG=352776

Review URL: https://codereview.chromium.org/200543005

git-svn-id: svn://svn.chromium.org/blink/trunk@169501 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Revert 169496 "HTML Imports: Send credentials for same origin re..."

broke maps_pixel_test on gpu debug bots (so far mac and linux, probably win also)

one exampel: http://chromegw.corp.google.com/i/chromium.webkit/builders/GPU%20Mac10.7%20%28dbg%29/builds/23223

> HTML Imports: Send credentials for same origin requests
> 
> This captures following spec chagne: https://www.w3.org/Bugs/Public/show_bug.cgi?id=24905
> The essential part of the change is in HTMLImportsController.cpp.
> Anything else is to make it work with redirect.
> 
> The problem here is that allowCredentials flag is held both
> by ResourceLoaderOptions and ResourceRequest and these two
> can go out-of-sync. This change tries to make them in sync.
> 
> Such a state duplication should be resolved eventually, but
> that is another story.
> 
> BUG=348671
> TEST=import-cors-credentials.html
> R=abarth, dglazkov@chromium.org
> 
> Review URL: https://codereview.chromium.org/196043002

TBR=morrita@chromium.org

Review URL: https://codereview.chromium.org/203593008

git-svn-id: svn://svn.chromium.org/blink/trunk@169504 bbb929c8-8fbe-4397-9dbb-9b2b20218538