Suppress WebKit crasher in reliability bot.  

WebKit bug: https://bugs.webkit.org/show_bug.cgi?id=56936
Chromium bug: http://code.google.com/p/chromium/issues/detail?id=77176

BUG=none
TEST=none

R=csilv@chromium.org,stuartmorgan@chromium.org,arv@chromium.org,jhawkins@chromium.org,estade@chromium.org
Review URL: http://codereview.chromium.org/6722028

git-svn-id: svn://svn.chromium.org/chrome/trunk/src/chrome/test/data/reliability@79151 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/known_crashes.txt b/known_crashes.txt
index ca5d745..db75e74 100644
--- a/known_crashes.txt
+++ b/known_crashes.txt
@@ -175,3 +175,7 @@
 
 # 76955
 PREFIX: webcore::renderobject::destroy___webcore::renderobjectchildlist::destroyleftoverchildren___webcore::renderblock::destroy
+
+# 77176
+PREFIX: webcore::implicitanimation::~implicitanimation___webcore::implicitanimation::`scalar deleting destructor'___wtf::hashtable<wtf::refptr<webcore::animationbase>,wtf::refptr<webcore::animationbase>,wtf::identityextractor<wtf::refptr<webcore::animationbase> >,wtf::ptrhash<wtf::refptr<webcore::animationbase> >,wtf::hashtraits<wtf::refptr<webcore::animationbase> >,wtf::hashtraits<wtf::refptr<webcore::animationbase> > >::deallocatetable
+