Several memory leaks in unit test: SpeechRecognitionAudioSinkTest.

Due to uninitialized memory.
This CL is fixing the issue.

BUG=408940, 422164, 422472
TEST=Memory bot for content_unittests

Review URL: https://codereview.chromium.org/645363005

Cr-Commit-Position: refs/heads/master@{#299277}

content/renderer/media/speech_recognition_audio_sink_unittest.cc

@@ -129,6 +129,7 @@ class FakeSpeechRecognizer {
     media::AudioInputBuffer* buffer =
         static_cast<media::AudioInputBuffer*>(shared_memory_->memory());
     audio_track_bus_ = media::AudioBus::WrapMemory(sink_params, buffer->audio);
+    audio_track_bus_->Zero();
 
     // Reference to the counter used to synchronize.
     buffer_index_ = &(buffer->params.size);
@@ -221,7 +222,7 @@ class SpeechRecognitionAudioSinkTest : public testing::Test {
                        output_sample_rate,
                        kOutputBitsPerSample,
                        output_frames_per_buffer);
-    source_data_.reset(new int16[input_frames_per_buffer * kInputChannels]);
+    source_data_.reset(new int16[input_frames_per_buffer * kInputChannels]{});
 
     // Prepare the track and audio source.
     blink::WebMediaStreamTrack blink_track;
@@ -318,9 +319,10 @@ class SpeechRecognitionAudioSinkTest : public testing::Test {
       const int output_sample_rate,
       const int output_frames_per_buffer,
       const uint32 consumptions) {
-  const uint32 kBuffersPerNotification =
-        Initialize(input_sample_rate, input_frames_per_buffer,
-                   output_sample_rate, output_frames_per_buffer);
+    const uint32 kBuffersPerNotification = Initialize(input_sample_rate,
+                                                      input_frames_per_buffer,
+                                                      output_sample_rate,
+                                                      output_frames_per_buffer);
     AssertConsumedBuffers(0U);
 
     for (uint32 i = 1U; i <= consumptions; ++i) {

tools/valgrind/drmemory/suppressions.txt

@@ -667,37 +667,3 @@ 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
-
-UNINITIALIZED READ
-name=http://crbug.com/422472 (d)
-content.dll!content::`anonymous namespace'::MaxAmplitude
-content.dll!content::MediaStreamAudioLevelCalculator::Calculate
-content.dll!content::WebRtcLocalAudioTrack::Capture
-...
-*!content::SpeechRecognitionAudioSinkTest_*_Test::TestBody
-

tools/valgrind/memcheck/suppressions.txt

@@ -3469,23 +3469,6 @@
    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
-}
-{
-   bug_422472b
-   Memcheck:Uninitialized
-   ...
-   fun:_ZN7content31MediaStreamAudioLevelCalculator9CalculateEPKsii
-   ...
-   fun:_ZN7content62SpeechRecognitionAudioSinkTest_RecognizerNotifiedOnSocket_Test8TestBodyEv
-}
 {
    bug_422485
    Memcheck:Overlap