Revert 226264 "Be able to build cast_unittest and related target..."

trunk/src/media/cast/cast_thread.cc

Index: trunk/src/media/cast/cast_thread.cc
===================================================================
--- trunk/src/media/cast/cast_thread.cc	(revision 226266)
+++ trunk/src/media/cast/cast_thread.cc	(working copy)
@@ -25,8 +25,6 @@
   DCHECK(main_thread_proxy) << "Main thread required";
 }
 
-CastThread::~CastThread() {}
-
 bool CastThread::PostTask(ThreadId identifier,
                           const tracked_objects::Location& from_here,
                           const base::Closure& task) {
@@ -59,9 +57,6 @@
       return video_encode_thread_proxy_;
     case CastThread::VIDEO_DECODER:
       return video_decode_thread_proxy_;
-    default:
-      CHECK(false) << "Invalid Thread ID.";
-      return NULL;
   }
 }
 
@@ -78,8 +73,7 @@
     case CastThread::VIDEO_DECODER:
       return video_decode_thread_proxy_->RunsTasksOnCurrentThread();
     default:
-      CHECK(false) << "Wrong thread identifier";
-      return false;
+      DCHECK(false) << "Wrong thread identifier";
   }
 }