Suppress leaks in blink::ModulesInitializer::init

tools/valgrind/memcheck/suppressions.txt

 # There are four 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 # running overnight and removing outdated bugs/suppressions.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 6182 matching lines @@
 }
 {
    bug_400547
    Memcheck:Uninitialized
    fun:_ZNK5blink22GraphicsLayerDebugInfo17appendOwnerNodeIdEPNS_10JSONObjectE
    fun:_ZNK5blink22GraphicsLayerDebugInfo19appendAsTraceFormatEPNS_9WebStringE
    fun:_ZNK7content15TracedDebugInfo19AppendAsTraceFormatEPSs
    fun:_ZNK2cc9LayerImpl11AsValueIntoEPN4base5debug11TracedValueE
    fun:_ZNK2cc*LayerImpl11AsValueIntoEPN4base5debug11TracedValueE
 }
+{
+   bug_403774
+   Memcheck:Leak
+   fun:_Znw*
+   ...
+   fun:_ZN5blink18ModulesInitializer4initEv
+   fun:_ZN5blink19initializeWithoutV8EPNS_8PlatformE
+   fun:_ZN5blink10initializeEPNS_8PlatformE
+   fun:_ZN7content25TestWebKitPlatformSupportC2Ev
+   fun:_ZN7content25TestWebKitPlatformSupportC1Ev
+   fun:_ZN7content17UnitTestTestSuiteC2EPN4base9TestSuiteE
+   fun:_ZN7content17UnitTestTestSuiteC1EPN4base9TestSuiteE
+}