suppress memory leak from v8 3.19.8.1

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 # running overnight and removing outdated bugs/suppressions.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 1872 matching lines @@
    fun:TemplateURLServiceTest::AddKeywordWithDate
    fun:TemplateURLServiceTest_ResetNonExtensionURLs_Test::TestBody
 }
 {
    bug_246560b
    Heapcheck:Leak
    fun:std::basic_string::_Rep::_S_create
    fun:std::operator+
    fun:TemplateURLServiceTest_ResetNonExtensionURLs_Test::TestBody
 }
+{
+   bug_246567a
+   Heapcheck:Leak
+   fun:v8::internal::PerThreadAssertScopeBase::AssertData
+   fun:v8::internal::PerThreadAssertScope::IsAllowed
+   fun:v8::internal::Heap::AllocateRaw
+   fun:v8::internal::Heap::Allocate
+   fun:v8::internal::Heap::AllocateForeign
+   fun:v8::internal::Heap::AllocateExternal
+   fun:v8::internal::Factory::NewExternal
+   fun:v8::External::New
+   fun:net::ProxyResolverV8::Context::InitV8
+   fun:net::ProxyResolverV8::SetPacScript
+   fun:net::ProxyResolverV8Tracing::Job::ExecuteProxyResolver
+   fun:net::ProxyResolverV8Tracing::Job::ExecuteBlocking
+}
+{
+   bug_246567b
+   Heapcheck:Leak
+   fun:v8::internal::PerThreadAssertScopeBase::AssertData
+   fun:v8::internal::PerThreadAssertScope::IsAllowed
+   fun:v8::internal::HandleScope::CreateHandle
+   fun:Handle
+   fun:MacroAssembler
+   fun:v8::internal::Deoptimizer::EnsureCodeForDeoptimizationEntry
+   fun:v8::internal::Isolate::Init
+   fun:v8::internal::V8::Initialize
+   fun:v8::internal::Snapshot::Initialize
+   fun:InitializeHelper
+   fun:v8::V8::Initialize
+   fun:v8::Locker::Initialize
+   fun:net::ProxyResolverV8::Context::InitV8
+   fun:net::ProxyResolverV8::SetPacScript
+   fun:net::ProxyResolverV8Tracing::Job::ExecuteProxyResolver
+   fun:net::ProxyResolverV8Tracing::Job::ExecuteBlocking
+}