Temp suppression for mem leak with Version::GetVersionFromString()...

tools/valgrind/memcheck/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 # running overnight and removing outdated bugs/suppressions.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 939 matching lines @@
 }
 {
    bug_17795
    Memcheck:Leak
    fun:_Znwj
    fun:_ZN3WTF9HashTableIPN7WebCore13QualifiedName17QualifiedNameImplES4_NS_17IdentityExtractorIS4_EENS1_17QualifiedNameHashENS_10HashTraitsIS4_EES9_E18addPassingHashCodeINS1_23QualifiedNameComponentsESC_NS_24HashSetTranslatorAdapterIS4_S9_SC_NS1_25QNameComponentsTranslatorEEEEESt4pairINS_17HashTableIteratorIS4_S4_S6_S7_S9_S9_EEbERKT_RKT0_
    fun:_ZN3WTF7HashSetIPN7WebCore13QualifiedName17QualifiedNameImplENS1_17QualifiedNameHashENS_10HashTraitsIS4_EEE3addINS1_23QualifiedNameComponentsENS1_25QNameComponentsTranslatorEEESt4pairINS_24HashTableIteratorAdapterINS_9HashTableIS4_S4_NS_17IdentityExtractorIS4_EES5_S7_S7_EES4_EEbERKT_
    fun:_ZN7WebCore13QualifiedNameC1ERKNS_12AtomicStringES3_S3_
    fun:_ZN7WebCore8SVGNames4initEv
 }
+
+{
+  crbug_18070
+  Memcheck:Leak
+  ...
+  fun:_ZN7Version20GetVersionFromStringERKSs
+  fun:_ZN17ExtensionsService24OnExternalExtensionFoundERKSsS1_RK8FilePathN9Extension8LocationE
+  fun:_ZN14RunnableMethodI17ExtensionsServiceMS0_FvRKSsS2_RK8FilePathN9Extension8LocationEE6Tuple4ISsSsS3_S7_EE3RunEv
+  fun:_ZN11MessageLoop7RunTaskEP4Task
+  fun:_ZN11MessageLoop21DeferOrRunPendingTaskERKNS_11PendingTaskE
+  fun:_ZN11MessageLoop6DoWorkEv
+  fun:_ZN4base18MessagePumpDefault3RunEPNS_11MessagePump8DelegateE
+  fun:_ZN11MessageLoop11RunInternalEv
+  fun:_ZN11MessageLoop10RunHandlerEv
+  fun:_ZN11MessageLoop13RunAllPendingEv
+  fun:_ZN46ExtensionsServiceTest_ExternalInstallPref_Test8TestBodyEv
+  fun:_ZN7testing4Test3RunEv
+  fun:_ZN7testing8internal12TestInfoImpl3RunEv
+  fun:_ZN7testing8internal12TestInfoImpl7RunTestEPNS_8TestInfoE
+  fun:_ZN7testing8TestCase3RunEv
+  fun:_ZN7testing8TestCase11RunTestCaseEPS0_
+  fun:_ZN7testing8internal12UnitTestImpl11RunAllTestsEv
+  fun:_ZN7testing8UnitTest3RunEv
+}