Revert of Move WebKitPlatformSupportImpl over to content. (https://codereview.chromium.org/184683002/)

Reason for revert:
I think this might not be this patch, perhaps related to recipe changes? But it broke the tree anyway, so I'm going to revert for now. Sorry if it's not related to this change. e.g.

http://build.chromium.org/p/chromium.chromiumos/buildstatus?builder=Linux%20ChromiumOS%20Full&number=399

Original issue's description:
> Move WebKitPlatformSupportImpl over to content.
> 
> In the process rename it BlinkPlatformImpl to avoid conflicts and confusion with an existing WebKitPlatformSupportImpl class in content.
> 
> This step is necessary because WebKitPlatformSupportImpl uses webkit/common/user_agent/, and we also want to move user_agent to content.
> 
> So this needs to happen first because webkit can't depend on content as content already depends on webkit, otherwise we would be creating a circular dependency.
> 
> WebURLLoader and WebSocketStreamHandleImpl had to be moved with WebKitPlatformSupportImpl, because they both uses WebKitPlatformSupportImpl and vice-versa.
> 
> BUG=265753,338338,237249
> TEST=content_unittests
> R=jam@chromium.org
> TBR=darin
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=254425

TBR=darin@chromium.org,jam@chromium.org,avi@chromium.org,tfarina@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=265753,338338,237249

Review URL: https://codereview.chromium.org/185603003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@254426 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 254426
Add free space print to see how near edge bots are

Temporarily for trybots to see how close to the edge they are.

TBR=iannucci@chromium.org
BUG=348350

Review URL: https://codereview.chromium.org/183923014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@254427 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 254427