Fix libpeerconnection build after a recent libjingle roll that added an encoder factory to webrtc.

third_party/libjingle/overrides/init_webrtc.h

 // Copyright 2013 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.
 
 #ifndef THIRD_PARTY_LIBJINGLE_OVERRIDES_INIT_WEBRTC_H_
 #define THIRD_PARTY_LIBJINGLE_OVERRIDES_INIT_WEBRTC_H_
 
 #include "allocator_shim/allocator_stub.h"
 
 class CommandLine;
 
 namespace cricket {
 class MediaEngineInterface;
 class WebRtcVideoDecoderFactory;
+class WebRtcVideoEncoderFactory;
 }  // namespace cricket
 
 namespace webrtc {
 class AudioDeviceModule;
 }  // namespace webrtc
 
 typedef cricket::MediaEngineInterface* (*CreateWebRtcMediaEngineFunction)(
     webrtc::AudioDeviceModule* adm,
     webrtc::AudioDeviceModule* adm_sc,
+    cricket::WebRtcVideoEncoderFactory* encoder_factory,
     cricket::WebRtcVideoDecoderFactory* decoder_factory);
 
 typedef void (*DestroyWebRtcMediaEngineFunction)(
     cricket::MediaEngineInterface* media_engine);
 
 // A typedef for the main initialize function in libpeerconnection.
 // This will initialize logging in the module with the proper arguments
 // as well as provide pointers back to a couple webrtc factory functions.
 // The reason we get pointers to these functions this way is to avoid having
 // to go through GetProcAddress et al and rely on specific name mangling.
 typedef bool (*InitializeModuleFunction)(
     const CommandLine& command_line,
 #if !defined(OS_MACOSX)
     AllocateFunction alloc,
     DellocateFunction dealloc,
 #endif
     CreateWebRtcMediaEngineFunction* create_media_engine,
     DestroyWebRtcMediaEngineFunction* destroy_media_engine);
 
+#if !defined(LIBPEERCONNECTION_IMPLEMENTATION)
 // Load and initialize the shared WebRTC module (libpeerconnection).
 // Call this explicitly to load and initialize the WebRTC module (e.g. before
 // initializing the sandbox in Chrome).
 // If not called explicitly, this function will still be called from the main
 // CreateWebRtcMediaEngine factory function the first time it is called.
 bool InitializeWebRtcModule();
+#endif
 
 #endif // THIRD_PARTY_LIBJINGLE_OVERRIDES_INIT_WEBRTC_H_