Heapchecker: Suppress new pepper plugin leaks.

BUG=103945
TEST=Heapchecker CrOS bot goes green.
Review URL: http://codereview.chromium.org/8540016

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@109706 0039d316-1c4b-4281-b951-d872f2087c98

tools/heapcheck/suppressions.txt

@@ -1714,3 +1714,13 @@
    fun:::ChromeTestSuiteInitializer::OnTestStart
    fun:testing::internal::TestEventRepeater::OnTestStart
 }
+{
+   bug_103945
+   Heapcheck:Leak
+   ...
+   fun:std::*string::_Rep::_S_create
+   ...
+   fun:PluginService::RegisterPepperPlugins
+   fun:PluginService::Init
+   fun:chromeos::::GViewRequestInterceptorTest::SetUp
+}