Revert "Remove CpuMonitor and related, unused, code."

webrtc/base/fakecpumonitor.h

Index: webrtc/base/fakecpumonitor.h
diff --git a/webrtc/examples/objc/AppRTCDemo/ios/main.m b/webrtc/base/fakecpumonitor.h
similarity index 50%
copy from webrtc/examples/objc/AppRTCDemo/ios/main.m
copy to webrtc/base/fakecpumonitor.h
index 00b83f7fd2f1cf5a7433cb388b4d39e589e4fb5e..c6ea0f2933cf1b647bb43a8907a50b70cf6f04a9 100644
--- a/webrtc/examples/objc/AppRTCDemo/ios/main.m
+++ b/webrtc/base/fakecpumonitor.h
@@ -8,13 +8,25 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#import <UIKit/UIKit.h>
+#ifndef WEBRTC_BASE_FAKECPUMONITOR_H_
+#define WEBRTC_BASE_FAKECPUMONITOR_H_
 
-#import "ARDAppDelegate.h"
+#include "webrtc/base/cpumonitor.h"
 
-int main(int argc, char* argv[]) {
-  @autoreleasepool {
-    return UIApplicationMain(
-        argc, argv, nil, NSStringFromClass([ARDAppDelegate class]));
+namespace rtc {
+
+class FakeCpuMonitor : public rtc::CpuMonitor {
+ public:
+  explicit FakeCpuMonitor(Thread* thread)
+      : CpuMonitor(thread) {
+  }
+  ~FakeCpuMonitor() {
+  }
+
+  virtual void OnMessage(rtc::Message* msg) {
   }
-}
+};
+
+}  // namespace rtc
+
+#endif  // WEBRTC_BASE_FAKECPUMONITOR_H_