Fix Valgrind errors that occurred during testing.

tools/valgrind/memcheck/suppressions.txt

Index: tools/valgrind/memcheck/suppressions.txt
diff --git a/tools/valgrind/memcheck/suppressions.txt b/tools/valgrind/memcheck/suppressions.txt
index 5cb52ac8e81600257461291100a048ae76d20bc5..f661930cdc47c34ea6947ef547aa4242ec3d6606 100644
--- a/tools/valgrind/memcheck/suppressions.txt
+++ b/tools/valgrind/memcheck/suppressions.txt
@@ -3277,30 +3277,3 @@
    fun:start_thread
    fun:clone
 }
-{
-   bug_62943 (Cond)
-   Memcheck:Cond
-   ...
-   fun:_ZN3gfx8PNGCodec6EncodeEPKhNS0_11ColorFormatEiiibPSt6vectorIhSaIhEE
-   fun:_ZN3gfx8PNGCodec18EncodeBGRASkBitmapERK8SkBitmapbPSt6vectorIhSaIhEE
-   fun:_ZN13safe_browsing26ClientSideDetectionService32StartClientReportPhishingRequestERK4GURLd8SkBitmapP14CallbackRunnerI6Tuple2IS1_bEE
-   fun:_Z16DispatchToMethodIN13safe_browsing26ClientSideDetectionServiceEMS1_FvRK4GURLd8SkBitmapP14CallbackRunnerI6Tuple2IS2_bEEES2_dS5_SA_EvPT_T0_RK6Tuple4IT1_T2_T3_T4_E
-}
-{
-   bug_62943 (Value4)
-   Memcheck:Value4
-   ...
-   fun:_ZN3gfx8PNGCodec6EncodeEPKhNS0_11ColorFormatEiiibPSt6vectorIhSaIhEE
-   fun:_ZN3gfx8PNGCodec18EncodeBGRASkBitmapERK8SkBitmapbPSt6vectorIhSaIhEE
-   fun:_ZN13safe_browsing26ClientSideDetectionService32StartClientReportPhishingRequestERK4GURLd8SkBitmapP14CallbackRunnerI6Tuple2IS1_bEE
-   fun:_Z16DispatchToMethodIN13safe_browsing26ClientSideDetectionServiceEMS1_FvRK4GURLd8SkBitmapP14CallbackRunnerI6Tuple2IS2_bEEES2_dS5_SA_EvPT_T0_RK6Tuple4IT1_T2_T3_T4_E
-}
-{
-   bug_62943 (Leak)
-   Memcheck:Leak
-   ...
-   fun:_ZN21FakeURLFetcherFactory16CreateURLFetcherEiRK4GURLN10URLFetcher11RequestTypeEPNS3_8DelegateE
-   fun:_ZN10URLFetcher6CreateEiRK4GURLNS_11RequestTypeEPNS_8DelegateE
-   fun:_ZN13safe_browsing26ClientSideDetectionService32StartClientReportPhishingRequestERK4GURLd8SkBitmapP14CallbackRunnerI6Tuple2IS1_bEE
-   fun:_Z16DispatchToMethodIN13safe_browsing26ClientSideDetectionServiceEMS1_FvRK4GURLd8SkBitmapP14CallbackRunnerI6Tuple2IS2_bEEES2_dS5_SA_EvPT_T0_RK6Tuple4IT1_T2_T3_T4_E
-}