Optimization: reduce the copying of string data between C++ and javascript in proxy_resolver_v8.cc.
This is done by sharing the string storage using ExternalStringResource.
An accompanying change was to pass around the PAC script data as a UTF16 string16 rather than a UTF8 std::string -- this required changing plumbing in the other files.
This optimization will be important when creating multiple ProxyResolverV8's so they don't end up duplicating the script text.
BUG=11079
Review URL: http://codereview.chromium.org/2817043
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@51434 0039d316-1c4b-4281-b951-d872f2087c98
22 files changed
