Remove RawChannel::Init() and Channel::Init() failure cases.

mojo/edk/system/channel.h

Index: mojo/edk/system/channel.h
diff --git a/mojo/edk/system/channel.h b/mojo/edk/system/channel.h
index 64acb7d22b1768a4cfba2a2e5fdb276b64fcbb73..396185908dd48b1f989425198bb61ac00a66e6f8 100644
--- a/mojo/edk/system/channel.h
+++ b/mojo/edk/system/channel.h
@@ -60,9 +60,8 @@ class MOJO_SYSTEM_IMPL_EXPORT Channel
 
   // This must be called on the creation thread before any other methods are
   // called, and before references to this object are given to any other
-  // threads. |raw_channel| should be uninitialized. Returns true on success. On
-  // failure, no other methods should be called (including |Shutdown()|).
-  bool Init(scoped_ptr<RawChannel> raw_channel);
+  // threads. |raw_channel| should be uninitialized.
+  void Init(scoped_ptr<RawChannel> raw_channel);
 
   // Sets the channel manager associated with this channel. This should be set
   // at most once and only called before |WillShutdownSoon()| (and