[chromedriver] Write command line file to both /data/local and /data/local/tmp for Chrome on Android.

This supports the new feature where setting chrome as the debug app
causes Chrome to look for the command line file in tmp.

BUG=chromedriver:665
TEST=None

Review URL: https://codereview.chromium.org/138873003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247901 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 247901
Pass rendering state on swapping in a prerendered page.

Android Chrome needs to learn whether or not WebContentsObserver::DidFinishLoad() has been called on the prerendered WebContents during the call to CoreTabHelperDelegate::SwapTabContents() here:
https://code.google.com/p/chromium/codesearch#chromium/src/chrome/browser/prerender/prerender_manager.cc&l=634&q=prerendermanager&type=cs&sq=package:chromium

BUG=335479

Review URL: https://codereview.chromium.org/143463012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247902 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 247902