Update DEPS, remove suppressions for bug 81753, fixed by CL 7891051

tools/valgrind/memcheck/suppressions_mac.txt

Index: tools/valgrind/memcheck/suppressions_mac.txt
diff --git a/tools/valgrind/memcheck/suppressions_mac.txt b/tools/valgrind/memcheck/suppressions_mac.txt
index 64c574adb9d9b575ddcb206fa81584cc8975cbf3..36d8a9175ff455dbc75defd101330a3c0ab4febd 100644
--- a/tools/valgrind/memcheck/suppressions_mac.txt
+++ b/tools/valgrind/memcheck/suppressions_mac.txt
@@ -821,33 +821,6 @@
    fun:_ZN14WebDataService29InitializeDatabaseIfNecessaryEv
 }
 {
-   bug_52364_a
-   Memcheck:Value4
-   fun:_ZNK10CMMConvLut7ConvertER10CMMMinBitsP14CMMRuntimeInfomm
-   fun:_Z16CMMProcessBitmapP15CMMBitmapParams
-   fun:DoMatchBitmap
-   fun:CWMatchBitmap
-   fun:ConvertImageGeneric
-   fun:CMSColorWorldConvertData
-   fun:CMSTransformConvertData
-   fun:CGCMSInterfaceTransformConvertData
-   fun:CGColorTransformConvertData
-}
-{
-   bug_52364_b
-   Memcheck:Cond
-   fun:_ZNK10CMMMtxOnly10ConvertMinE10CMM3x3Type10CMM3x1TypeR12CMMMinBuffermm
-   fun:_ZNK21CMMConvMatrixTemplateI10CMMMtxOnly22CMMConvGrayToRGBMatrixE7ConvertER10CMMMinBitsP14CMMRuntimeInfomm
-   fun:_Z16CMMProcessBitmapP15CMMBitmapParams
-   fun:DoMatchBitmap
-   fun:CWMatchBitmap
-   fun:ConvertImageGeneric
-   fun:CMSColorWorldConvertData
-   fun:CMSTransformConvertData
-   fun:CGCMSInterfaceTransformConvertData
-   fun:CGColorTransformConvertData
-}
-{
    bug_52681_a
    Memcheck:Leak
    fun:_Znw*