Wire up chrome field trials with webrtc.

third_party/libjingle/overrides/initialize_module.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 "allocator_shim/allocator_stub.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "init_webrtc.h"
 #include "talk/base/basictypes.h"
@@ skipping 20 matching lines @@
 // Forward declare of the libjingle internal factory and destroy methods for the
 // WebRTC media engine.
 cricket::MediaEngineInterface* CreateWebRtcMediaEngine(
     webrtc::AudioDeviceModule* adm,
     webrtc::AudioDeviceModule* adm_sc,
     cricket::WebRtcVideoEncoderFactory* encoder_factory,
     cricket::WebRtcVideoDecoderFactory* decoder_factory);
 
 void DestroyWebRtcMediaEngine(cricket::MediaEngineInterface* media_engine);
 
+// Define webrtc:field_trial::FindFullName to provide webrtc with a field trial
+// implementation. The implementation is provided by the loader via the
+// InitializeModule.
+namespace {
+FieldTrialFindFullName g_field_trial_find_ = NULL;
+}
+
+namespace webrtc {
+namespace field_trial {
+std::string FindFullName(const std::string& trial_name) {
+  return g_field_trial_find_(trial_name);
+}
+}  // namespace field_trial
+}  // namespace webrtc
+
 extern "C" {
 
 // Initialize logging, set the forward allocator functions (not on mac), and
 // return pointers to libjingle's WebRTC factory methods.
 // Called from init_webrtc.cc.
 ALLOC_EXPORT
 bool InitializeModule(const CommandLine& command_line,
 #if !defined(OS_MACOSX) && !defined(OS_ANDROID)
                       AllocateFunction alloc,
                       DellocateFunction dealloc,
 #endif
+                      FieldTrialFindFullName field_trial_find,
                       logging::LogMessageHandlerFunction log_handler,
                       webrtc::GetCategoryEnabledPtr trace_get_category_enabled,
                       webrtc::AddTraceEventPtr trace_add_trace_event,
                       CreateWebRtcMediaEngineFunction* create_media_engine,
                       DestroyWebRtcMediaEngineFunction* destroy_media_engine,
                       InitDiagnosticLoggingDelegateFunctionFunction*
                           init_diagnostic_logging) {
 #if !defined(OS_MACOSX) && !defined(OS_ANDROID)
   g_alloc = alloc;
   g_dealloc = dealloc;
 #endif
 
+  g_field_trial_find_ = field_trial_find;
+
   *create_media_engine = &CreateWebRtcMediaEngine;
   *destroy_media_engine = &DestroyWebRtcMediaEngine;
   *init_diagnostic_logging = &talk_base::InitDiagnosticLoggingDelegateFunction;
 
   if (CommandLine::Init(0, NULL)) {
 #if !defined(OS_WIN)
     // This is not needed on Windows since CommandLine::Init has already
     // done the equivalent thing via the GetCommandLine() API.
     CommandLine::ForCurrentProcess()->AppendArguments(command_line, true);
 #endif
     logging::LoggingSettings settings;
     settings.logging_dest = logging::LOG_TO_SYSTEM_DEBUG_LOG;
     logging::InitLogging(settings);
 
     // Override the log message handler to forward logs to chrome's handler.
     logging::SetLogMessageHandler(log_handler);
     webrtc::SetupEventTracer(trace_get_category_enabled,
                              trace_add_trace_event);
   }
 
   return true;
 }
 }  // extern "C"