Revert of Extract re-usable InitializeMediaFoundation()

Revert of Extract re-usable InitializeMediaFoundation() (patchset #3 id:40001 of https://codereview.chromium.org/1149203002/)

Reason for revert:
Broke compile on the Win GN bots: http://build.chromium.org/p/chromium.win/builders/Win%20x64%20GN%20%28dbg%29/builds/2154

Original issue's description:
> Extract re-usable InitializeMediaFoundation()
>
> Allow media::InitializeMediaFoundation() to be used by any Media
> Foundation client code.  This benefits existing Chromium code as well as any
> Chromium-based browser that adds its own code calling out to Media Foundation.
>
> There are two side effects for DXVAVideoDecodeAccelerator:
>
>   - MFStartup() and MFShutdown() are now called once during the lifetime of the
>     GPU process rather than per each accelerator instance.
>
>   - MFStartup() is now called with the MFSTARTUP_LITE flag, which according to
>     MSDN doesn't initialize the sockets library.
>
> TEST=media_unittests
>
> Committed: https://crrev.com/c0ab75a86447bc23d45ff7086b2375e2cd83c205
> Cr-Commit-Position: refs/heads/master@{#331446}

TBR=sandersd@chromium.org,wdzierzanowski@opera.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed: https://crrev.com/13c59839d6142eb81308bdda8d8da25b05137a28
Cr-Commit-Position: refs/heads/master@{#331448}

[scottmg, 2015-05-26 22:12:18]

Created Revert of Extract re-usable InitializeMediaFoundation()

[commit-bot: I haz the power, 2015-05-26 22:13:04]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1154273002/1

[commit-bot: I haz the power, 2015-05-26 22:14:38]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-26 22:15:30]

Patchset 1 (id:??) landed as
https://crrev.com/13c59839d6142eb81308bdda8d8da25b05137a28
Cr-Commit-Position: refs/heads/master@{#331448}