Revert of DirectWrite Font Cache browser side hookup

Revert of DirectWrite Font Cache browser side hookup (patchset #5 id:80001 of https://codereview.chromium.org/724633002/)

Reason for revert:
Seems to be flaking occasionally, see e.g. http://build.chromium.org/p/chromium.win/builders/Win7%20Tests%20%28dbg%29%281%29/builds/32711/steps/browser_tests/logs/stdio

@@@STEP_LOG_LINE@UnchangedCustom_1@PrefHashBrowserTestUnchangedCustomInstance/PrefHashBrowserTestUnchangedCustom.UnchangedCustom/1 (run #4):@@@
@@@STEP_LOG_LINE@UnchangedCustom_1@[ RUN      ] PrefHashBrowserTestUnchangedCustomInstance/PrefHashBrowserTestUnchangedCustom.UnchangedCustom/1@@@
@@@STEP_LOG_LINE@UnchangedCustom_1@[3308:4824:1114/190930:WARNING:data_reduction_proxy_settings.cc(328)] SPDY proxy OFF at startup@@@
@@@STEP_LOG_LINE@UnchangedCustom_1@[4200:5032:1114/190932:FATAL:dwrite_font_platform_win.cc(493)] Check failed: false.@@@
@@@STEP_LOG_LINE@UnchangedCustom_1@Backtrace:@@@
@@@STEP_LOG_LINE@UnchangedCustom_1@	base::DiscardableMemoryShmemAllocator::~DiscardableMemoryShmemAllocator [0x10099E01+538517]@@@
@@@STEP_LOG_LINE@UnchangedCustom_1@	base::DiscardableMemoryShmemAllocator::~DiscardableMemoryShmemAllocator [0x10129E1F+1128371]@@@
@@@STEP_LOG_LINE@UnchangedCustom_1@	content::WebContentsImpl::WasShown [0x1326A46D+21053350]@@@
@@@STEP_LOG_LINE@UnchangedCustom_1@	DWriteCreateFactory [0x6D494A06+363338]@@@
@@@STEP_LOG_LINE@UnchangedCustom_1@	DWriteCreateFactory [0x6D49402C+360816]@@@

Original issue's description:
> DirectWrite Font Cache browser side hookup
> This part is mainly to hookup browser side for building and loading font cache.
> In browser's postprofileinit if font cache already exists in user profile directory
> then we load that and create a read only shared memory section. If cache is not there
> then we spawn a Chrome utility process to build font cache, which will be used when browser restarts.
>
> For details on how whole thing works please look at design document at https://goto.google.com/font-cache-design
>
> BUG=406659
> R=cpu, scottmg, ananta
>
> Committed: https://crrev.com/5140a1f1ba5bd57d5c7d9af04ed3eb8ac83f487d
> Cr-Commit-Position: refs/heads/master@{#304277}

TBR=ananta@chromium.org,cpu@chromium.org,shrikant@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=406659
Committed: https://crrev.com/251b3d34c15a0b7745f9fd40f0375e1fd1eedbef
Cr-Commit-Position: refs/heads/master@{#304349}

[scottmg, 2014-11-15 04:03:20]

Created Revert of DirectWrite Font Cache browser side hookup

[commit-bot: I haz the power, 2014-11-15 04:04:20]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/729103002/1

[commit-bot: I haz the power, 2014-11-15 04:05:12]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-11-15 04:06:26]

Patchset 1 (id:??) landed as
https://crrev.com/251b3d34c15a0b7745f9fd40f0375e1fd1eedbef
Cr-Commit-Position: refs/heads/master@{#304349}