Valgrind/Heapchecker: Add a new suppression for a JsSyncManagerObserverTest leak.

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 # running overnight and removing outdated bugs/suppressions.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 615 matching lines @@
 {
    bug_60872
    Heapcheck:Leak
    fun:base::BaseTimer::Start
    fun:ReloadButtonGtk::OnClicked
    fun:ReloadButtonGtk::OnClickedThunk
    fun:g_closure_invoke
    fun:ReloadButtonGtkTest_*_Test::TestBody
 }
 {
+   bug_65940_a
+   Heapcheck:Leak
+   ...
+   fun:IPC::SyncChannel::SyncChannel
+   fun:ChildThread::Init
+   fun:ChildThread::ChildThread
+   fun:RenderThreadImpl::RenderThreadImpl
+}
+{
+   bug_65940_b
+   Heapcheck:Leak
+   fun:__gnu_cxx::new_allocator::allocate
+   fun:std::_Vector_base::_M_allocate
+   fun:std::vector::_M_insert_aux
+   fun:std::vector::push_back
+   fun:IPC::ChannelProxy::Context::OnAddFilter
+}
+{
    bug_66054_a
    Heapcheck:Leak
    ...
    fun:policy::CreateSequencedTestDictionaryActionP::gmock_Impl::gmock_PerformImpl
    fun:testing::internal::ActionHelper::Perform
    fun:policy::CreateSequencedTestDictionaryActionP::gmock_Impl::Perform
    fun:testing::Action::Perform
    fun:testing::internal::FunctionMockerBase::InvokeWith
    fun:testing::internal::FunctionMocker::Invoke
    fun:policy::ProviderDelegateMock::Load
@@ skipping 732 matching lines @@
    # Like 125129_b, but for Chromium OS instead of Linux.
    bug_125129_c
    Heapcheck:Leak
    ...
    fun:RenderProcessHostImpl
    fun:SiteInstanceImpl::GetProcess
    ...
    fun:*_*_Test::TestBody
 }
 {
-   bug_127717
-   Heapcheck:Leak
-   ...
-   fun:SkBitmap::HeapAllocator::allocPixelRef
-   fun:SkBitmap::allocPixels
-   fun:SkBitmap::allocPixels
-}
-{
    bug_128145
    Heapcheck:Leak
    ...
    fun:BuildWebDataService
    fun:RefcountedProfileKeyedServiceFactory::GetServiceForProfile
    fun:RefcountedProfileKeyedServiceFactory::SetTestingFactoryAndUse
    fun:TestingProfile::CreateWebDataService
 }
 {
    bug_129392
@@ skipping 66 matching lines @@
    fun:gfx::RenderText::IndexOfAdjacentGrapheme
    fun:gfx::RenderTextTest_GraphemePositions_Test::TestBody
 }
 {
    bug_134717
    Heapcheck:Leak
    fun:ui::InputMethodIBus::CreateContext
    fun:ui::InputMethodIBus::Init
 }
 {
-   bug_65940_a
-   Heapcheck:Leak
-   ...
-   fun:IPC::SyncChannel::SyncChannel
-   fun:ChildThread::Init
-   fun:ChildThread::ChildThread
-   fun:RenderThreadImpl::RenderThreadImpl
-}
-{
-   bug_65940_b
-   Heapcheck:Leak
-   fun:__gnu_cxx::new_allocator::allocate
-   fun:std::_Vector_base::_M_allocate
-   fun:std::vector::_M_insert_aux
-   fun:std::vector::push_back
-   fun:IPC::ChannelProxy::Context::OnAddFilter
-}
-{
    bug_136936
    Heapcheck:Leak
    ...
    fun:std::basic_string::_Rep::_S_create
    ...
    fun:base::PlatformThread::SetName
 }
+{
+   bug_139635
+   Heapcheck:Leak
+   fun:syncer::JsSyncManagerObserver::OnInitializationComplete
+   fun:syncer::::JsSyncManagerObserverTest_OnInitializationComplete_Test::TestBody
+}