Suppress a couple of leaks to make MFYI waterfall greener

tools/valgrind/memcheck/suppressions_mac.txt

 # There are three kinds of suppressions in this file:
 # 1. Third party stuff we have no control over.
 #
 # 2. Intentional unit test errors, 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.
 # Periodically we should sweep this file and the bug tracker clean by
 # running overnight and removing outdated bugs/suppressions.
@@ skipping 2434 matching lines @@
    fun:-[NSBundle _initInfoDictionary]
    fun:+[NSBundle mainBundle]
    fun:_ZN4base3mac11OuterBundleEv
    fun:_ZN4base3mac12_GLOBAL__N_118UncachedAmIBundledEv
    fun:_ZN4base3mac10AmIBundledEv
    fun:_ZN7content25TestWebKitPlatformSupportC2Ev
    fun:_ZN7content25TestWebKitPlatformSupportC1Ev
    fun:_ZN7content17UnitTestTestSuiteC2EPN4base9TestSuiteE
    fun:_ZN7content17UnitTestTestSuiteC1EPN4base9TestSuiteE
 }
+{
+   bug_380568
+   Memcheck:Leak
+   fun:calloc
+   fun:_internal_class_createInstanceFromZone
+   fun:_internal_class_createInstance
+   fun:NSAllocateObject
+   fun:+[NSObject(NSObject) alloc]
+   fun:-[VideoCaptureDeviceQTKit initWithFrameReceiver:]
+   fun:_ZN5media21VideoCaptureDeviceMac4InitENS_18VideoCaptureDevice4Name14CaptureApiTypeE
+   fun:_ZN5media28VideoCaptureDeviceFactoryMac6CreateERKNS_18VideoCaptureDevice4NameE
+   fun:_ZN5media45VideoCaptureDeviceTest_OpenInvalidDevice_Test8TestBodyEv
+}