Revert 212230 "Create top-level separate targets for browser and..."

Revert 212230 "Create top-level separate targets for browser and..."

Caused Linux x64 sizes to fail for reasons unclear.

> Create top-level separate targets for browser and child dlls
> 
> The general idea is that there's top level targets chrome and chrome_child,
> and corresponding content_app and content_app_child that depend on only
> the subtargets that should be included in the appropriate dll.
> 
> Pull bluetooth_utils from bluetooth_device into separate common target
> as it's referenced from chrome/common/extensions.
> 
> Currently (probably) Windows-only and requires setting chrome_multiple_dll=1
> for gyp.
> 
> Links, but Blink is still included in browser.
> 
> Single-process mode is currently disabled when chrome_multiple_dll is set.
> 
> Current graph is at: http://commondatastorage.googleapis.com/chromelinkgraph/deps.html
> generated by "python tools\win\split_link\graph_dependencies.py deps.html"
> 
> Remove the previous hacky-er attempt at this that was named "split dll".
> 
> TBR=jam@chromium.org
> 
> BUG=237249, 256965
> 
> Review URL: https://codereview.chromium.org/17619005

TBR=scottmg@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=212239

[scottmg, 2013-07-18 04:14:46]

Committed patchset #1 manually as r212239.