Moves audio files from content\renderer\ to content\renderer\media.

Moves audio files from content\renderer\ to content\renderer\media.
A total of nine files are moved.

BUG=none
TEST=none

[henrika_dont_use, 2011-06-08 08:45:47]

This patch moves 

audio_device.cc
audio_device.h
audio_input_device.cc
audio_input_device.h
audio_input_message_filter.cc
audio_input_message_filter.h
audio_message_filter.cc
audio_message_filter.h
audio_message_filter_unittest.cc

from content/renderer to content/renderer/media.

The goal is to refactor the audio message filters and Audio{Input}Device and
this patch is the initial step.

[henrika_dont_use, 2011-06-09 14:49:02]

Added Aaron as reviewer based on recommendation from Andrew who is on vacation.

[scherkus (not reviewing), 2011-06-13 18:15:44]

LGTM  w/ nits

I'll fix them since I don't think commit-queue can understand this patch

http://codereview.chromium.org/7003053/diff/1/content/renderer/media/audio_de...
File content/renderer/media/audio_device.h (right):

http://codereview.chromium.org/7003053/diff/1/content/renderer/media/audio_de...
content/renderer/media/audio_device.h:5: #ifndef
CONTENT_RENDERER_AUDIO_DEVICE_H_
update header guard

http://codereview.chromium.org/7003053/diff/1/content/renderer/media/audio_in...
File content/renderer/media/audio_input_device.h (right):

http://codereview.chromium.org/7003053/diff/1/content/renderer/media/audio_in...
content/renderer/media/audio_input_device.h:5: #ifndef
CONTENT_RENDERER_AUDIO_INPUT_DEVICE_H_
update header guard

http://codereview.chromium.org/7003053/diff/1/content/renderer/media/audio_me...
File content/renderer/media/audio_message_filter.h (right):

http://codereview.chromium.org/7003053/diff/1/content/renderer/media/audio_me...
content/renderer/media/audio_message_filter.h:10: #ifndef
CONTENT_RENDERER_AUDIO_MESSAGE_FILTER_H_
update header guard

http://codereview.chromium.org/7003053/diff/1/content/renderer/media/audio_re...
File content/renderer/media/audio_renderer_impl.h (right):

http://codereview.chromium.org/7003053/diff/1/content/renderer/media/audio_re...
content/renderer/media/audio_renderer_impl.h:37: #ifndef
CONTENT_RENDERER_MEDIA_AUDIO_RENDERER_IMPL_H_
update header guard

[scherkus (not reviewing), 2011-06-13 22:47:46]

+jamesr to sanity check content/renderer

[jamesr, 2011-06-14 00:55:30]

lgtm