Revert 246676 "PPAPI: Split up URLLoader tests to reduce timeouts"

> PPAPI: Split up URLLoader tests to reduce timeouts
> 
> BUG=95005,308906,336999
> 
> Review URL: https://codereview.chromium.org/143823012

TBR=dmichael@chromium.org

Review URL: https://codereview.chromium.org/131153006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246713 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 246713
android: Stop adding toolchain dir to PATH.

This seems mostly no longer necessary (at least I can build all targets
in an open-source chrome/android build without problems). I'm guessing
that https://codereview.chromium.org/9693042 made this obsolete.

It was only needed for `as` with clang; pass -B to clang instead
for now (until we switch to clang's integrated assembler).

BUG=330631,124610
R=torne@chromium.org

Review URL: https://codereview.chromium.org/133963003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246714 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 246714