Heapchecker: Suppress new pepper plugin leaks.

tools/heapcheck/suppressions.txt

 # There are three kinds of suppressions in this file.
 # 1. third party stuff we have no control over
 #
 # 2. intentional unit test errors, or stuff that is somehow a false positive
 # in our own code, or stuff that is so trivial it's not worth fixing
 #
 # 3. Suppressions for real chromium bugs that are not yet fixed.
 # These should all be in chromium's bug tracking system (but a few aren't yet).
 # Periodically we should sweep this file and the bug tracker clean by
 # running overnight and removing outdated bugs/suppressions.
@@ skipping 1696 matching lines @@
 {
    bug_103704
    Heapcheck:Leak
    fun:std::string::_Rep::_S_create
    fun:std::string::copy
    fun:std::basic_string::basic_string
    fun:TestingBrowserProcess
    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
+}