Fix various uninitialized member variables in media code.

Review URL: https://codereview.chromium.org/415273002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@285438 0039d316-1c4b-4281-b951-d872f2087c98

content/renderer/media/crypto/key_systems.cc

@@ -125,7 +125,8 @@ class KeySystems {
   friend struct base::DefaultLazyInstanceTraits<KeySystems>;
 
   struct KeySystemProperties {
-    KeySystemProperties() : use_aes_decryptor(false) {}
+    KeySystemProperties()
+        : use_aes_decryptor(false), supported_codecs(EME_CODEC_NONE) {}
 
     bool use_aes_decryptor;
 #if defined(ENABLE_PEPPER_CDMS)

content/renderer/media/webmediaplayer_impl.cc

@@ -176,6 +176,7 @@ WebMediaPlayerImpl::WebMediaPlayerImpl(
           RenderThreadImpl::current()->GetMediaThreadMessageLoopProxy()),
       media_log_(new RenderMediaLog()),
       pipeline_(media_loop_, media_log_.get()),
+      load_type_(LoadTypeURL),
       opaque_(false),
       paused_(true),
       seeking_(false),

media/filters/audio_renderer_impl.cc

@@ -47,6 +47,7 @@ AudioRendererImpl::AudioRendererImpl(
     const SetDecryptorReadyCB& set_decryptor_ready_cb,
     AudioHardwareConfig* hardware_config)
     : task_runner_(task_runner),
+      expecting_config_changes_(false),
       sink_(sink),
       audio_buffer_stream_(new AudioBufferStream(task_runner,
                                                  decoders.Pass(),

media/filters/decoder_stream.cc

@@ -46,6 +46,7 @@ DecoderStream<StreamType>::DecoderStream(
     : task_runner_(task_runner),
       state_(STATE_UNINITIALIZED),
       stream_(NULL),
+      low_delay_(false),
       decoder_selector_(
           new DecoderSelector<StreamType>(task_runner,
                                           decoders.Pass(),

media/formats/mp4/mp4_stream_parser.cc

@@ -30,6 +30,7 @@ MP4StreamParser::MP4StreamParser(const std::set<int>& audio_object_types,
     : state_(kWaitingForInit),
       moof_head_(0),
       mdat_tail_(0),
+      highest_end_offset_(0),
       has_audio_(false),
       has_video_(false),
       audio_track_id_(0),