Memcheck:Uninitialized suppression for ExtensionTestingProfile.

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 # running overnight and removing outdated bugs/suppressions.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 5328 matching lines @@
    fun:_ZN10extensions6SocketC?EPK7ProfileRKSsRK4GURL
    fun:_ZN10extensions16SocketController9CreateUdpEPK7ProfileRKSsRK4GURL
    fun:_ZN10extensions57SocketApiControllerTest_TestSocketControllerLifetime_Test8TestBodyEv
 }
 {
    bug_106549
    Memcheck:Uninitialized
    fun:_ZN16ExtensionService24ProcessExtensionSyncDataERK17ExtensionSyncDataRNS_10SyncBundleE
    fun:_ZN16ExtensionService18ProcessSyncChangesERKN15tracked_objects8LocationERKSt6vectorI10SyncChangeSaIS5_EE
 }
+{
+   bug_106552
+   Memcheck:Uninitialized
+   ...
+   fun:_ZN25JSONStringValueSerializer17SerializeInternalERKN4base5ValueEb
+   fun:_ZN25JSONStringValueSerializer9SerializeERKN4base5ValueE
+   fun:_ZN13JsonPrefStore13SerializeDataEPSs
+   fun:_ZN19ImportantFileWriter16DoScheduledWriteEv
+   fun:_ZN13JsonPrefStore18CommitPendingWriteEv
+   fun:_ZN13JsonPrefStoreD0Ev
+   fun:_ZNK4base10RefCountedI9PrefStoreE7ReleaseEv
+   fun:_ZN13scoped_refptrI19PersistentPrefStoreEaSEPS0_
+   fun:_ZN11PrefServiceD0Ev
+   fun:_ZN10scoped_ptrI11PrefServiceED1Ev
+   fun:_ZN14TestingProfileD2Ev
+   fun:_ZN23ExtensionTestingProfileD0Ev
+}
 
 #-----------------------------------------------------------------------
 # 4. These only occur on our Google workstations
 {
    bug_todo_freeres
    Memcheck:Free
    fun:free
    fun:__libc_freeres
    fun:_vgnU_freeres
    fun:_Exit
@@ skipping 17 matching lines @@
    obj:/lib/libselinux.so.1
    obj:/lib/libselinux.so.1
 }
 {
    bug_todo_grep
    Memcheck:Leak
    fun:malloc
    obj:/bin/grep
    obj:/bin/grep
 }