Coverity: Initialize member variables.

media/video/capture/win/video_capture_device_win.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/video/capture/win/video_capture_device_win.h"
 
 #include <algorithm>
 #include <list>
 
 #include "base/string_util.h"
@@ skipping 234 matching lines @@
   VideoCaptureDeviceWin* self = new VideoCaptureDeviceWin(device_name);
   if (self  && self->Init())
     return self;
 
   delete self;
   return NULL;
 }
 
 VideoCaptureDeviceWin::VideoCaptureDeviceWin(const Name& device_name)
     : device_name_(device_name),
-      state_(kIdle) {
+      state_(kIdle),
+      observer_(NULL) {
 }
 
 VideoCaptureDeviceWin::~VideoCaptureDeviceWin() {
   if (media_control_)
     media_control_->Stop();
 
   if (graph_builder_) {
     if (sink_filter_) {
       graph_builder_->RemoveFilter(sink_filter_);
       sink_filter_ = NULL;
@@ skipping 381 matching lines @@
   return diff_list.front().capability_index;
 }
 
 void VideoCaptureDeviceWin::SetErrorState(const char* reason) {
   DLOG(ERROR) << reason;
   state_ = kError;
   observer_->OnError();
 }
 
 }  // namespace media