[MemSheriff] Suppress uninit reads for Speech Recognition

NOTRY=true
TBR=benwells@chromium.org, burnik@chromium.org
BUG=422472

Review URL: https://codereview.chromium.org/643443005

Cr-Commit-Position: refs/heads/master@{#299174}

tools/valgrind/drmemory/suppressions.txt

@@ -667,3 +667,28 @@ blink_web.dll!blink::FrameView::removeFromAXObjectCache
 blink_web.dll!blink::FrameView::prepareForDetach
 blink_web.dll!blink::LocalFrame::setView
 blink_web.dll!blink::FrameTree::~FrameTree
+
+UNINITIALIZED READ
+name=http://crbug.com/422472 (a)
+shared_memory_support.dll!media::FromInterleavedInternal<>
+shared_memory_support.dll!media::AudioBus::FromInterleavedPartial
+shared_memory_support.dll!media::AudioBus::FromInterleaved
+content.dll!content::SpeechRecognitionAudioSink::OnData
+content.dll!content::MediaStreamAudioSinkOwner::OnData
+content.dll!content::WebRtcLocalAudioTrack::Capture
+*!content::SpeechRecognitionAudioSinkTest_RecognizerNotifiedOnSocket_Test::TestBody
+*!testing::internal::HandleExceptionsInMethodIfSupported<>
+
+UNINITIALIZED READ
+name=http://crbug.com/422472 (b)
+shared_memory_support.dll!media::FromInterleavedInternal<>
+...
+*!content::SpeechRecognitionAudioSinkTest::CaptureAudio
+*!content::SpeechRecognitionAudioSinkTest_OnReadyStateChangedOccured_Test::TestBody
+
+UNINITIALIZED READ
+name=http://crbug.com/422472 (c)
+shared_memory_support.dll!media::FromInterleavedInternal<>
+...
+*!content::SpeechRecognitionAudioSinkTest::CaptureAudio
+*!content::SpeechRecognitionAudioSinkTest_SyncSocketFailsSendingData_Test::TestBody

tools/valgrind/memcheck/suppressions.txt

@@ -3469,3 +3469,12 @@
    fun:_ZN5blink13InlineFlowBox5paintERNS_9PaintInfoERKNS_11LayoutPointENS_10LayoutUnitES6_
    fun:_ZN5blink13RootInlineBox5paintERNS_9PaintInfoERKNS_11LayoutPointENS_10LayoutUnitES6_
 }
+{
+   bug_422472a
+   Memcheck:Uninitialized
+   fun:_ZN5mediaL23FromInterleavedInternalIssLs0EEEvPKviiPNS_8AudioBusEff
+   ...
+   fun:_ZN7content30SpeechRecognitionAudioSinkTest12CaptureAudioEj
+   fun:_ZN7content30SpeechRecognitionAudioSinkTest35AssertConsumptionForAudioParametersEiiiij
+   fun:_ZN7content62SpeechRecognitionAudioSinkTest_RecognizerNotifiedOnSocket_Test8TestBodyEv
+}