Adjust base address of chrome dll and provide a base addess for chrome_elf

This should stop the address conflicts suspected of causing the perf regression.

TEST= working set size returns to normal
BUG=318691

Review URL: https://codereview.chromium.org/77673005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@237259 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 237259