Add PLT histograms that are equivalent to the existing set but use the PerformanceTiming data
Add PLT histograms that are equivalent to the existing set but use the PerformanceTiming data

BUG=
R=jar@chromium.org

Review URL: http://codereview.chromium.org/9254037

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@118992 0039d316-1c4b-4281-b951-d872f2087c98

gavinp/chromium,yitian134/chromium,ropik/chromium,gavinp/chromium,ropik/chromium,ropik/chromium,adobe/chromium,gavinp/chromium,adobe/chromium,ropik/chromium,adobe/chromium,adobe/chromium,gavinp/chromium,gavinp/chromium,adobe/chromium,gavinp/chromium,adobe/chromium,adobe/chromium,adobe/chromium,adobe/chromium,yitian134/chromium,gavinp/chromium,yitian134/chromium,yitian134/chromium,ropik/chromium,adobe/chromium,ropik/chromium,ropik/chromium,yitian134/chromium,yitian134/chromium,yitian134/chromium,ropik/chromium,gavinp/chromium,yitian134/chromium,yitian134/chromium,ropik/chromium,yitian134/chromium,gavinp/chromium,gavinp/chromium,adobe/chromium