Revert of Reland 501823002: Used native deinterleaved and float point format for the input streams

Revert of Reland  501823002: Used native deinterleaved and float point format for the input streams (patchset #4 id:80001 of https://codereview.chromium.org/510073002/)

Reason for revert:
It is speculated that this CL is blamed for crbug/409819, I temporarily revert it to be able to verify it on canary.

Original issue's description:
> Used native deinterleaved and float point format for the input streams.
> 
> If we call GetProperty of kAudioUnitProperty_StreamFormat before setting the format, the device will report kAudioFormatFlagsNativeFloatPacked | kLinearPCMFormatFlagIsNonInterleaved as the native format of the device, which is the same as the output.
> 
> This patch changes the format to use kAudioFormatFlagsNativeFloatPacked | kLinearPCMFormatFlagIsNonInterleaved to open the device, so that we will avoid format flipping back and forth. Hope this optimization will help increase the stability of the input audio on Mac.
> 
> TBR=DaleCurtis@chromium.org
> 
> BUG=404884
> TEST=media_unittests && https://webrtc.googlecode.com/svn-history/r5497/trunk/samples/js/demos/html/pc1.html, https://www.google.com/intl/en/chrome/demos/speech.html
> 
> Committed: https://chromium.googlesource.com/chromium/src/+/2c732c000e18a6decd1da8da24e1f5f9e5f16833

TBR=dalecurtis@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=404884
Committed: https://crrev.com/6e5a8c5087c7f6d827d5eb39996a4065d2397a0b
Cr-Commit-Position: refs/heads/master@{#293156}

[no longer working on chromium, 2014-09-03 16:44:07]

Created Revert of Reland  501823002: Used native deinterleaved and float point
format for the input streams

[commit-bot: I haz the power, 2014-09-03 16:44:24]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/xians@chromium.org/532303002/1

[commit-bot: I haz the power, 2014-09-03 16:59:56]

Committed patchset #1 (id:1) as c2332215db30c0cba4a3e276b5f8b30f1cff2ce0

[commit-bot: I haz the power, 2014-09-10 03:26:21]

Patchset 1 (id:??) landed as
https://crrev.com/6e5a8c5087c7f6d827d5eb39996a4065d2397a0b
Cr-Commit-Position: refs/heads/master@{#293156}