History: Fix container overflow caused by rounding error when page is zoomed.

BUG=281264
TEST=See repro steps in bug.

Review URL: https://codereview.chromium.org/98373013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243269 0039d316-1c4b-4281-b951-d872f2087c98
Eliminate ExtensionService::terminated_extensions()

* Convert calls to use ExtensionRegistry::terminated_extensions().
* Deprecate ExtensionService::extensions() and disabled_extensions().

BUG=none
TEST=compiles
TBR=phajdan.jr@chromium.org for automation, atwilson@chromium.org for background

Review URL: https://codereview.chromium.org/117163004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243270 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 243270