Binding media stream audio track to speech recognition - bugfix

content/renderer/media/speech_recognition_audio_sink_unittest.cc

Index: content/renderer/media/speech_recognition_audio_sink_unittest.cc
diff --git a/content/renderer/media/speech_recognition_audio_sink_unittest.cc b/content/renderer/media/speech_recognition_audio_sink_unittest.cc
index 917b6a2f828688e3dfa5da10f864eadf689d4261..e9b0d32cd4957801bddace3d43d53a3000bf2165 100644
--- a/content/renderer/media/speech_recognition_audio_sink_unittest.cc
+++ b/content/renderer/media/speech_recognition_audio_sink_unittest.cc
@@ -116,11 +116,12 @@ class FakeSpeechRecognizer {
       const media::AudioParameters& sink_params,
       base::SharedMemoryHandle* foreign_memory_handle) {
     // Shared memory is allocated, mapped and shared.
-    uint32 shared_memory_size =
+    const uint32 kSharedMemorySize =
         sizeof(media::AudioInputBufferParameters) +
         media::AudioBus::CalculateMemorySize(sink_params);
     shared_memory_.reset(new base::SharedMemory());
-    ASSERT_TRUE(shared_memory_->CreateAndMapAnonymous(shared_memory_size));
+    ASSERT_TRUE(shared_memory_->CreateAndMapAnonymous(kSharedMemorySize));
+    memset(shared_memory_->memory(), 0, kSharedMemorySize);
     ASSERT_TRUE(shared_memory_->ShareToProcess(base::GetCurrentProcessHandle(),
                                                foreign_memory_handle));