Revert of Add support for escaped target names in isolate driver. (patchset #8 id...

Revert of Add support for escaped target names in isolate driver. (patchset #8 id:140001 of https://codereview.chromium.org/1103793002/)

Reason for revert:
Broke interactive_ui_tests and sync_integration_tests on Mac. See first breakage: http://build.chromium.org/p/chromium.mac/builders/Mac10.9%20Tests%20%28dbg%29/builds/5606

Possibly need to include the chrome.isolate in the isolates for browser_tests, and the two test suites mentioned above.

Original issue's description:
> Add support for escaped target names in isolate driver.
>
> Currently the isolate_driver.py which creates the dependency files
> used by the isolate system, does a simple split on all spaces when
> trying to identify targets.
>
> This can fail if the target name contains a space in the name. In
> ninja, spaces are escaped with a $-prefix. An example would be
> 'Content$ Shell$ Helper.app'.
>
> This CL adds support for such target names and ensures that they
> stay as one item. Doing this uncovered a few missing dependencies
> and a missing file in some .isolate-files for the component build
> on Mac.
>
> Original CL: https://codereview.chromium.org/970203003
>
> BUG=462248
>
> Committed: https://crrev.com/86c49590cbae332dc933cd9ae3f67d240fb1f125
> Cr-Commit-Position: refs/heads/master@{#328236}

TBR=vadimsh@chromium.org,thakis@chromium.org,maruel@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=462248

Review URL: https://codereview.chromium.org/1129493003

Cr-Commit-Position: refs/heads/master@{#328289}