Telemetry / Android: make perfhost prebuilt an executable.

Small follow-up from crrev.com/225958

BUG=

Review URL: https://codereview.chromium.org/25505003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@226283 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 226283
Move TransferNavigationResourceThrottle into CrossSiteResourceHandler.

We now transfer requests to a new process when they are ready to commit, rather than each time a redirect occurs.  This simplifies the ResourceDispatcherHost logic, and it prepares for a future CL to intercept all navigations in the browser process.

BUG=238331
TEST=No more than one process swap for repeated redirects.

Review URL: https://codereview.chromium.org/15476003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@226284 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 226284