Wire up chrome field trials with webrtc.

third_party/libjingle/overrides/init_webrtc.cc

 // 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.
 
 #include "init_webrtc.h"
 
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
+#include "base/metrics/field_trial.h"
 #include "base/native_library.h"
 #include "base/path_service.h"
 #include "talk/base/basictypes.h"
 #include "third_party/libjingle/overrides/talk/base/logging.h"
 
 const unsigned char* GetCategoryGroupEnabled(const char* category_group) {
   return TRACE_EVENT_API_GET_CATEGORY_GROUP_ENABLED(category_group);
 }
 
 void AddTraceEvent(char phase,
@@ skipping 14 matching lines @@
 
 // libpeerconnection is being compiled as a static lib.  In this case
 // we don't need to do any initializing but to keep things simple we
 // provide an empty intialization routine so that this #ifdef doesn't
 // have to be in other places.
 bool InitializeWebRtcModule() {
   webrtc::SetupEventTracer(&GetCategoryGroupEnabled, &AddTraceEvent);
   return true;
 }
 
+// Define webrtc:field_trial::FindFullName to provide webrtc with a field trial
+// implementation. When compiled as a static library this can be done directly
+// and without pointers to functions.
+namespace webrtc {
+namespace field_trial {
+std::string FindFullName(const std::string& trial_name) {
+  return base::FieldTrialList::FindFullName(trial_name);
+}
+}  // namespace field_trial
+}  // namespace webrtc
+
 #else  // !LIBPEERCONNECTION_LIB
 
 // When being compiled as a shared library, we need to bridge the gap between
 // the current module and the libpeerconnection module, so things get a tad
 // more complicated.
 
 // Global function pointers to the factory functions in the shared library.
 CreateWebRtcMediaEngineFunction g_create_webrtc_media_engine = NULL;
 DestroyWebRtcMediaEngineFunction g_destroy_webrtc_media_engine = NULL;
 
@@ skipping 55 matching lines @@
   // allocator/deallocator routines.
   // On mac we use malloc zones, which are global, so we provide NULLs for
   // the alloc/dealloc functions.
   // PS: This function is actually implemented in allocator_proxy.cc with the
   // new/delete overrides.
   InitDiagnosticLoggingDelegateFunctionFunction init_diagnostic_logging = NULL;
   bool init_ok = initialize_module(*CommandLine::ForCurrentProcess(),
 #if !defined(OS_MACOSX) && !defined(OS_ANDROID)
       &Allocate, &Dellocate,
 #endif
+      &base::FieldTrialList::FindFullName,
       logging::GetLogMessageHandler(),
       &GetCategoryGroupEnabled, &AddTraceEvent,
       &g_create_webrtc_media_engine, &g_destroy_webrtc_media_engine,
       &init_diagnostic_logging);
 
   if (init_ok)
     talk_base::SetExtraLoggingInit(init_diagnostic_logging);
   return init_ok;
 }
 
 cricket::MediaEngineInterface* CreateWebRtcMediaEngine(
     webrtc::AudioDeviceModule* adm,
     webrtc::AudioDeviceModule* adm_sc,
     cricket::WebRtcVideoEncoderFactory* encoder_factory,
     cricket::WebRtcVideoDecoderFactory* decoder_factory) {
   // For convenience of tests etc, we call InitializeWebRtcModule here.
   // For Chrome however, InitializeWebRtcModule must be called
   // explicitly before the sandbox is initialized.  In that case, this call is
   // effectively a noop.
   InitializeWebRtcModule();
   return g_create_webrtc_media_engine(adm, adm_sc, encoder_factory,
       decoder_factory);
 }
 
 void DestroyWebRtcMediaEngine(cricket::MediaEngineInterface* media_engine) {
   g_destroy_webrtc_media_engine(media_engine);
 }
 
 #endif  // LIBPEERCONNECTION_LIB