Clean up PlatformThread.

webrtc/base/thread.h

Index: webrtc/base/thread.h
diff --git a/webrtc/base/thread.h b/webrtc/base/thread.h
index 9cbe8ec4dc54f1c5a2e9748b7e6a5782302ab3ff..f91aa56733cb82a880adf6c35ae43114c712fe07 100644
--- a/webrtc/base/thread.h
+++ b/webrtc/base/thread.h
@@ -78,13 +78,6 @@ struct _SendMessage {
   bool *ready;
 };
 
-enum ThreadPriority {
-  PRIORITY_IDLE = -1,
-  PRIORITY_NORMAL = 0,
-  PRIORITY_ABOVE_NORMAL = 1,
-  PRIORITY_HIGH = 2,
-};
-
 class Runnable {
  public:
   virtual ~Runnable() {}
@@ -137,10 +130,6 @@ class Thread : public MessageQueue {
   const std::string& name() const { return name_; }
   bool SetName(const std::string& name, const void* obj);
 
-  // Sets the thread's priority. Must be called before Start().
-  ThreadPriority priority() const { return priority_; }
-  bool SetPriority(ThreadPriority priority);
-
   // Starts the execution of the thread.
   bool Start(Runnable* runnable = NULL);
 
@@ -271,7 +260,6 @@ class Thread : public MessageQueue {
 
   std::list<_SendMessage> sendlist_;
   std::string name_;
-  ThreadPriority priority_;
   Event running_;  // Signalled means running.
 
 #if defined(WEBRTC_POSIX)