[MemSheriff] Skia overlapped memcpy

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 # running overnight and removing outdated bugs/suppressions.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 3468 matching lines @@
    fun:_ZN7content62SpeechRecognitionAudioSinkTest_RecognizerNotifiedOnSocket_Test8TestBodyEv
 }
 {
    bug_422472b
    Memcheck:Uninitialized
    ...
    fun:_ZN7content31MediaStreamAudioLevelCalculator9CalculateEPKsii
    ...
    fun:_ZN7content62SpeechRecognitionAudioSinkTest_RecognizerNotifiedOnSocket_Test8TestBodyEv
 }
+{
+   bug_422485
+   Memcheck:Overlap
+   fun:memcpy@@GLIBC_2.14
+   fun:_ZNK8SkBitmap12copyPixelsToEPvmmb
+   fun:_ZN5blink19ImageFrameGenerator14decodeAndScaleERK11SkImageInfomPvm
+   fun:_ZN5blink22DecodingImageGenerator11onGetPixelsERK11SkImageInfoPvmPjPi
+   fun:_ZN16SkImageGenerator9getPixelsERK11SkImageInfoPvmPjPi
+   ...
+   fun:_ZNK6SkDraw10drawBitmapERK8SkBitmapRK8SkMatrixRK7SkPaint
+}