Remove unused libpeerconnection code.

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/files/file_path.h"
 #include "base/files/file_util.h"
+#include "base/logging.h"
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram.h"
 #include "base/native_library.h"
 #include "base/path_service.h"
 #include "base/trace_event/trace_event.h"
 #include "third_party/webrtc/overrides/webrtc/base/basictypes.h"
 #include "third_party/webrtc/overrides/webrtc/base/logging.h"
+#include "third_party/webrtc/system_wrappers/interface/event_tracer.h"
 
 const unsigned char* GetCategoryGroupEnabled(const char* category_group) {
   return TRACE_EVENT_API_GET_CATEGORY_GROUP_ENABLED(category_group);
 }
 
 void AddTraceEvent(char phase,
                    const unsigned char* category_group_enabled,
                    const char* name,
                    unsigned long long id,
                    int num_args,
@@ skipping 10 matching lines @@
 // Define webrtc::field_trial::FindFullName to provide webrtc with a field trial
 // implementation.
 namespace field_trial {
 std::string FindFullName(const std::string& trial_name) {
   return base::FieldTrialList::FindFullName(trial_name);
 }
 }  // namespace field_trial
 
 // Define webrtc::metrics functions to provide webrtc with implementations.
 namespace metrics {
+
+// This class doesn't actually exist, so don't go looking for it :)
+// This type is just fwd declared here in order to use it as an opaque type
+// between the Histogram functions in this file.
+class Histogram;
+
 Histogram* HistogramFactoryGetCounts(
     const std::string& name, int min, int max, int bucket_count) {
   return reinterpret_cast<Histogram*>(
       base::Histogram::FactoryGet(name, min, max, bucket_count,
           base::HistogramBase::kUmaTargetedHistogramFlag));
 }
 
 Histogram* HistogramFactoryGetEnumeration(
     const std::string& name, int boundary) {
   return reinterpret_cast<Histogram*>(
       base::LinearHistogram::FactoryGet(name, 1, boundary, boundary + 1,
           base::HistogramBase::kUmaTargetedHistogramFlag));
 }
 
 void HistogramAdd(
     Histogram* histogram_pointer, const std::string& name, int sample) {
   base::HistogramBase* ptr =
       reinterpret_cast<base::HistogramBase*>(histogram_pointer);
   // The name should not vary.
   DCHECK(ptr->histogram_name() == name);
   ptr->Add(sample);
 }
 }  // namespace metrics
 }  // namespace webrtc
 
-#if defined(LIBPEERCONNECTION_LIB)
-
 // 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;
 }
-
-#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;
-
-// Returns the full or relative path to the libpeerconnection module depending
-// on what platform we're on.
-static base::FilePath GetLibPeerConnectionPath() {
-  base::FilePath path;
-  CHECK(PathService::Get(base::DIR_MODULE, &path));
-#if defined(OS_WIN)
-  path = path.Append(FILE_PATH_LITERAL("libpeerconnection.dll"));
-#elif defined(OS_MACOSX)
-  // Simulate '@loader_path/Libraries'.
-  path = path.Append(FILE_PATH_LITERAL("Libraries"))
-             .Append(FILE_PATH_LITERAL("libpeerconnection.so"));
-#elif defined(OS_ANDROID)
-  path = path.Append(FILE_PATH_LITERAL("libpeerconnection.so"));
-#else
-  path = path.Append(FILE_PATH_LITERAL("lib"))
-             .Append(FILE_PATH_LITERAL("libpeerconnection.so"));
-#endif
-  return path;
-}
-
-bool InitializeWebRtcModule() {
-  TRACE_EVENT0("webrtc", "InitializeWebRtcModule");
-
-  if (g_create_webrtc_media_engine)
-    return true;  // InitializeWebRtcModule has already been called.
-
-  base::FilePath path(GetLibPeerConnectionPath());
-  DVLOG(1) << "Loading WebRTC module: " << path.value();
-
-  base::NativeLibraryLoadError error;
-  static base::NativeLibrary lib = base::LoadNativeLibrary(path, &error);
-#if defined(OS_WIN)
-  // We've been seeing problems on Windows with loading the DLL and we're
-  // not sure exactly why.  It could be that AV programs are quarantining the
-  // file or disallowing loading the DLL. To get a better picture of the errors
-  // we're checking these specific error codes.
-  if (error.code == ERROR_MOD_NOT_FOUND) {
-    // It's possible that we get this error due to failure to load other
-    // dependencies, so check first that libpeerconnection actually exists.
-    CHECK(base::PathExists(path));  // libpeerconnection itself is missing.
-    CHECK(lib);  // If we hit this, a dependency is missing.
-  } else if (error.code == ERROR_ACCESS_DENIED) {
-    CHECK(lib);  // AV blocking access?
-  }
-#endif
-
-  // Catch-all error handler for all other sorts of errors.
-  CHECK(lib) << error.ToString();
-
-  InitializeModuleFunction initialize_module =
-      reinterpret_cast<InitializeModuleFunction>(
-          base::GetFunctionPointerFromNativeLibrary(
-              lib, "InitializeModule"));
-
-  // Initialize the proxy by supplying it with a pointer to our
-  // 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(*base::CommandLine::ForCurrentProcess(),
-#if !defined(OS_MACOSX) && !defined(OS_ANDROID)
-      &Allocate,
-      &Dellocate,
-#endif
-      &webrtc::field_trial::FindFullName,
-      &webrtc::metrics::HistogramFactoryGetCounts,
-      &webrtc::metrics::HistogramFactoryGetEnumeration,
-      &webrtc::metrics::HistogramAdd,
-      logging::GetLogMessageHandler(),
-      &GetCategoryGroupEnabled,
-      &AddTraceEvent,
-      &g_create_webrtc_media_engine,
-      &g_destroy_webrtc_media_engine,
-      &init_diagnostic_logging);
-
-  if (init_ok)
-    rtc::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