Widen Histogram&PNG-related suppressions  BUG=30704,75127 TBR=dcheng,jar TEST=./tools/valgrind/waterfall.sh Review URL: http://codereview.chromium.org/6852020
Widen Histogram&PNG-related suppressions 
BUG=30704,75127
TBR=dcheng,jar
TEST=./tools/valgrind/waterfall.sh
Review URL: http://codereview.chromium.org/6852020

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@81563 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser