Add to known_crashes.txt for 83674 and 83676.

(WebCore::CSSStyleSelector::loadPendingImages and WebCore::RenderStyle::hasPseudoStyle)

BUG=83674,83676
TEST=reliability bots

Review URL: http://codereview.chromium.org/7064016

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@86372 0039d316-1c4b-4281-b951-d872f2087c98

chrome/test/data/reliability/known_crashes.txt

@@ -174,3 +174,9 @@ REGEX : ^deletetask.*::run___messageloop::runtask___messageloop::dowork
 
 # 83657
 PREFIX: base::internal::lockimpl::lock___extensioncontentsettingsstore::geteffectivecontentsetting___content_settings::extensionprovider::getcontentsetting
+
+# 83674
+PREFIX: webcore::cssstyleselector::loadpendingimages___webcore::cssstyleselector::styleforelement___webcore::node::styleforrenderer
+
+# 83676
+PREFIX: webcore::renderstyle::haspseudostyle___webcore::cssstyleselector::styleforelement___webcore::node::styleforrenderer