Remove ConditionVariableWrapper.

webrtc/system_wrappers/source/condition_variable_native_win.cc

Index: webrtc/system_wrappers/source/condition_variable_native_win.cc
diff --git a/webrtc/system_wrappers/source/condition_variable_native_win.cc b/webrtc/system_wrappers/source/condition_variable_native_win.cc
deleted file mode 100644
index 3c0723090764962353aa57285beb75e46cbde9a6..0000000000000000000000000000000000000000
--- a/webrtc/system_wrappers/source/condition_variable_native_win.cc
+++ /dev/null
@@ -1,102 +0,0 @@
-/*
- *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#include "webrtc/system_wrappers/include/critical_section_wrapper.h"
-#include "webrtc/system_wrappers/include/trace.h"
-#include "webrtc/system_wrappers/source/condition_variable_native_win.h"
-
-namespace webrtc {
-
-static HMODULE library = NULL;
-static bool win_support_condition_variables_primitive = false;
-
-PInitializeConditionVariable  PInitializeConditionVariable_;
-PSleepConditionVariableCS     PSleepConditionVariableCS_;
-PWakeConditionVariable        PWakeConditionVariable_;
-PWakeAllConditionVariable     PWakeAllConditionVariable_;
-
-typedef void (WINAPI *PInitializeConditionVariable)(PCONDITION_VARIABLE);
-typedef BOOL (WINAPI *PSleepConditionVariableCS)(PCONDITION_VARIABLE,
-                                                 PCRITICAL_SECTION, DWORD);
-typedef void (WINAPI *PWakeConditionVariable)(PCONDITION_VARIABLE);
-typedef void (WINAPI *PWakeAllConditionVariable)(PCONDITION_VARIABLE);
-
-ConditionVariableNativeWin::ConditionVariableNativeWin() {
-}
-
-ConditionVariableNativeWin::~ConditionVariableNativeWin() {
-}
-
-ConditionVariableWrapper* ConditionVariableNativeWin::Create() {
-  ConditionVariableNativeWin* ret_val = new ConditionVariableNativeWin();
-  if (!ret_val->Init()) {
-    delete ret_val;
-    return NULL;
-  }
-  return ret_val;
-}
-
-bool ConditionVariableNativeWin::Init() {
-  if (!library) {
-    // Native implementation is supported on Vista+.
-    library = LoadLibrary(TEXT("Kernel32.dll"));
-    // TODO(henrike): this code results in an attempt to load the above dll
-    // every time the previous attempt failed. Only try to load once.
-    if (library) {
-      // TODO(henrike): not thread safe as reading and writing to library is not
-      // serialized. Fix.
-      WEBRTC_TRACE(kTraceStateInfo, kTraceUtility, -1, "Loaded Kernel.dll");
-
-      PInitializeConditionVariable_ =
-          (PInitializeConditionVariable) GetProcAddress(
-              library, "InitializeConditionVariable");
-      PSleepConditionVariableCS_ = (PSleepConditionVariableCS) GetProcAddress(
-          library, "SleepConditionVariableCS");
-      PWakeConditionVariable_ = (PWakeConditionVariable) GetProcAddress(
-          library, "WakeConditionVariable");
-      PWakeAllConditionVariable_ = (PWakeAllConditionVariable) GetProcAddress(
-          library, "WakeAllConditionVariable");
-
-      if (PInitializeConditionVariable_ && PSleepConditionVariableCS_
-          && PWakeConditionVariable_ && PWakeAllConditionVariable_) {
-        WEBRTC_TRACE(
-            kTraceStateInfo, kTraceUtility, -1,
-            "Loaded native condition variables");
-        win_support_condition_variables_primitive = true;
-      }
-    }
-  }
-  if (!win_support_condition_variables_primitive) {
-    return false;
-  }
-  PInitializeConditionVariable_(&condition_variable_);
-  return true;
-}
-
-void ConditionVariableNativeWin::SleepCS(CriticalSectionWrapper& crit_sect) {
-  SleepCS(crit_sect, INFINITE);
-}
-
-bool ConditionVariableNativeWin::SleepCS(CriticalSectionWrapper& crit_sect,
-                                         unsigned long max_time_in_ms) {
-  BOOL ret_val = PSleepConditionVariableCS_(&condition_variable_,
-                                            &crit_sect.crit_, max_time_in_ms);
-  return ret_val != 0;
-}
-
-void ConditionVariableNativeWin::Wake() {
-  PWakeConditionVariable_(&condition_variable_);
-}
-
-void ConditionVariableNativeWin::WakeAll() {
-  PWakeAllConditionVariable_(&condition_variable_);
-}
-
-}  // namespace webrtc