Mojo: Rename (Mojo)WaitFlagsState -> (Mojo)HandleSignalsState.

mojo/system/local_data_pipe.h

Index: mojo/system/local_data_pipe.h
diff --git a/mojo/system/local_data_pipe.h b/mojo/system/local_data_pipe.h
index 7eb0f5f3d423368e201e2b1447a0bfe0677dedfe..74ed15604cbf92cca89d9668d54aaddefbb250f6 100644
--- a/mojo/system/local_data_pipe.h
+++ b/mojo/system/local_data_pipe.h
@@ -40,7 +40,8 @@ class MOJO_SYSTEM_IMPL_EXPORT LocalDataPipe : public DataPipe {
       bool all_or_none) OVERRIDE;
   virtual MojoResult ProducerEndWriteDataImplNoLock(
       uint32_t num_bytes_written) OVERRIDE;
-  virtual WaitFlagsState ProducerGetWaitFlagsStateNoLock() const OVERRIDE;
+  virtual HandleSignalsState
+      ProducerGetHandleSignalsStateNoLock() const OVERRIDE;
   virtual void ConsumerCloseImplNoLock() OVERRIDE;
   virtual MojoResult ConsumerReadDataImplNoLock(void* elements,
                                                 uint32_t* num_bytes,
@@ -53,7 +54,8 @@ class MOJO_SYSTEM_IMPL_EXPORT LocalDataPipe : public DataPipe {
                                                      bool all_or_none) OVERRIDE;
   virtual MojoResult ConsumerEndReadDataImplNoLock(
       uint32_t num_bytes_read) OVERRIDE;
-  virtual WaitFlagsState ConsumerGetWaitFlagsStateNoLock() const OVERRIDE;
+  virtual HandleSignalsState
+      ConsumerGetHandleSignalsStateNoLock() const OVERRIDE;
 
   void EnsureBufferNoLock();
   void DestroyBufferNoLock();