Suppress leaks happened after making platform/heap to use USING_FAST_MALLOC

Failures are:
http://build.chromium.org/p/chromium.memory.fyi/builders/Linux%20Tests%20%28valgrind%29%282%29/builds/52771
http://build.chromium.org/p/chromium.memory.fyi/builders/Chromium%20OS%20%28valgrind%29%282%29/builds/7261

These are caused by DEFINE_STATIC_REF / DEFINE_STATIC_LOCAL with Persistent. The leaks are expected.

BUG=562431

Review URL: https://codereview.chromium.org/1635863005

Cr-Commit-Position: refs/heads/master@{#371487}

tools/valgrind/memcheck/suppressions.txt

@@ -3405,3 +3405,55 @@
    fun:_ZN2cc10GLRenderer18DrawRenderPassQuadEPNS_14DirectRenderer12DrawingFrameEPKNS_18RenderPassDrawQuadEPKN3gfx5QuadFE
    fun:_ZN2cc10GLRenderer10DoDrawQuadEPNS_14DirectRenderer12DrawingFrameEPKNS_8DrawQuadEPKN3gfx5QuadFE
 }
+{
+   bug_562431_a
+   Memcheck:Leak
+   fun:malloc
+   fun:_ZN3WTF10Partitions10fastMallocEmPKc
+   fun:_ZN5blink14PersistentBaseINS_15StyleFilterDataELNS_31WeaknessPersistentConfigurationE0ELNS_38CrossThreadnessPersistentConfigurationE0EEnwEm
+   fun:_ZN5blink26RefCountedGarbageCollectedINS_15StyleFilterDataEE13makeKeepAliveEv
+   fun:_ZN5blink26RefCountedGarbageCollectedINS_15StyleFilterDataEE3refEv
+   fun:_ZN3WTF6RefPtrIN5blink15StyleFilterDataEEC2IS2_EERKNS_6RawPtrIT_EEPNSt9enable_ifIXsr3std10is_base_ofIS2_S6_EE5valueEvE4typeE
+   fun:_ZN5blink7DataRefINS_15StyleFilterDataEE4initEv
+   fun:_ZN5blink13ComputedStyle18createInitialStyleEv
+   fun:_ZN5blink13ComputedStyle12initialStyleEv
+   fun:_ZN5blink13ComputedStyle6createEv
+   fun:_ZN5blink13StyleResolver16styleForDocumentERNS_8DocumentE
+   fun:_ZN5blink8Document6attachERKNS_4Node13AttachContextE
+   fun:_ZN5blink14LocalDOMWindow18installNewDocumentERKN3WTF6StringERKNS_12DocumentInitEb
+   fun:_ZN5blink14DocumentLoader15createWriterForEPKNS_8DocumentERKNS_12DocumentInitERKN3WTF12AtomicStringESA_bNS_27ParserSynchronizationPolicyE
+   fun:_ZN5blink14DocumentLoader12ensureWriterERKN3WTF12AtomicStringERKNS_4KURLE
+   fun:_ZN5blink14DocumentLoader10commitDataEPKcm
+   fun:_ZN5blink14DocumentLoader15finishedLoadingEd
+   fun:_ZN5blink14DocumentLoader14maybeLoadEmptyEv
+   fun:_ZN5blink14DocumentLoader24startLoadingMainResourceEv
+   fun:_ZN5blink11FrameLoader4initEv
+   fun:_ZN5blink10LocalFrame4initEv
+   fun:_ZN5blink17WebLocalFrameImpl19initializeCoreFrameEPNS_9FrameHostEPNS_10FrameOwnerERKN3WTF12AtomicStringES8_
+}
+{
+   bug_562431_b
+   Memcheck:Leak
+   fun:malloc
+   fun:_ZN3WTF10Partitions10fastMallocEmPKc
+   fun:_ZN5blink21ContextFeaturesClientnwEm
+   fun:_ZN5blink21ContextFeaturesClient5emptyEv
+   fun:_ZN5blink15ContextFeatures13defaultSwitchEv
+   fun:_ZN5blink8DocumentC2ERKNS_12DocumentInitEh
+   fun:_ZN5blink12HTMLDocumentC1ERKNS_12DocumentInitEh
+   fun:_ZN5blink12HTMLDocument6createERKNS_12DocumentInitE
+   fun:_ZN5blink17DOMImplementation14createDocumentERKN3WTF6StringERKNS_12DocumentInitEb
+   fun:_ZN5blink14LocalDOMWindow14createDocumentERKN3WTF6StringERKNS_12DocumentInitEb
+   fun:_ZN5blink14LocalDOMWindow18installNewDocumentERKN3WTF6StringERKNS_12DocumentInitEb
+   fun:_ZN5blink14DocumentLoader15createWriterForEPKNS_8DocumentERKNS_12DocumentInitERKN3WTF12AtomicStringESA_bNS_27ParserSynchronizationPolicyE
+   fun:_ZN5blink14DocumentLoader12ensureWriterERKN3WTF12AtomicStringERKNS_4KURLE
+   fun:_ZN5blink14DocumentLoader10commitDataEPKcm
+   fun:_ZN5blink14DocumentLoader15finishedLoadingEd
+   fun:_ZN5blink14DocumentLoader14maybeLoadEmptyEv
+   fun:_ZN5blink14DocumentLoader24startLoadingMainResourceEv
+   fun:_ZN5blink11FrameLoader4initEv
+   fun:_ZN5blink10LocalFrame4initEv
+   fun:_ZN5blink17WebLocalFrameImpl19initializeCoreFrameEPNS_9FrameHostEPNS_10FrameOwnerERKN3WTF12AtomicStringES8_
+   fun:_ZN5blink11WebViewImpl12setMainFrameEPNS_8WebFrameE
+   fun:_ZN10extensions14ScopedWebFrameC1Ev
+}