Valgrind: Suppress a couple more leaks in layout tests.

BUG=417093,417119
NOTRY=true
TBR=groby@chromium.org

Review URL: https://codereview.chromium.org/600663003

Cr-Commit-Position: refs/heads/master@{#296329}

tools/valgrind/memcheck/suppressions.txt

@@ -4052,3 +4052,28 @@
    fun:_ZN5blink13RootInlineBox5paintERNS_9PaintInfoERKNS_11LayoutPointENS_10LayoutUnitES6_
    fun:_ZNK5blink17RenderLineBoxList5paintEPNS_20RenderBoxModelObjectERNS_9PaintInfoERKNS_11LayoutPointE
 }
+{
+   bug_417093
+   Memcheck:Leak
+   fun:malloc
+   fun:_ZN3WTF10fastMallocEm
+   fun:_ZN3WTF24ThreadSafeRefCountedBasenwEm
+   fun:_ZN5blink7RawData6createEv
+   fun:_ZN5blink6Stream7addDataEPKcm
+   fun:_ZN5blink14XMLHttpRequest14didReceiveDataEPKci
+   fun:_ZThn80_N5blink14XMLHttpRequest14didReceiveDataEPKci
+   fun:_ZN5blink24DocumentThreadableLoader18handleReceivedDataEPKci
+   fun:_ZN5blink24DocumentThreadableLoader12dataReceivedEPNS_8ResourceEPKci
+   fun:_ZThn16_N5blink24DocumentThreadableLoader12dataReceivedEPNS_8ResourceEPKci
+}
+{
+   bug_417119
+   Memcheck:Leak
+   fun:_Znw*
+   ...
+   fun:_ZN7storage27TaskRunnerBoundObserverListINS_18FileUpdateObserverEPS1_EaSERKS3_
+   fun:_ZN7storage26FileSystemOperationContext20set_update_observersERKNS_27TaskRunnerBoundObserverListINS_18FileUpdateObserverEPS2_EE
+   fun:_ZNK7storage32SandboxFileSystemBackendDelegate32CreateFileSystemOperationContextERKNS_13FileSystemURLEPNS_17FileSystemContextEPN4base4File5ErrorE
+   fun:_ZNK7storage24SandboxFileSystemBackend25CreateFileSystemOperationERKNS_13FileSystemURLEPNS_17FileSystemContextEPN4base4File5ErrorE
+   fun:_ZN7storage17FileSystemContext25CreateFileSystemOperationERKNS_13FileSystemURLEPN4base4File5ErrorE
+}