Revert of Update mojo sdk to rev c02a28868825edfa57ab77947b8cb15e741c5598

third_party/mojo/src/mojo/edk/system/data_pipe_producer_dispatcher.h

Index: third_party/mojo/src/mojo/edk/system/data_pipe_producer_dispatcher.h
diff --git a/third_party/mojo/src/mojo/edk/system/data_pipe_producer_dispatcher.h b/third_party/mojo/src/mojo/edk/system/data_pipe_producer_dispatcher.h
index 7ce51566001a4aad9d421dadee2d9f43bb0fe53e..86697fe396146041cfee4203cfab2a2517167871 100644
--- a/third_party/mojo/src/mojo/edk/system/data_pipe_producer_dispatcher.h
+++ b/third_party/mojo/src/mojo/edk/system/data_pipe_producer_dispatcher.h
@@ -26,7 +26,7 @@
   }
 
   // Must be called before any other methods.
-  void Init(scoped_refptr<DataPipe> data_pipe) MOJO_NOT_THREAD_SAFE;
+  void Init(scoped_refptr<DataPipe> data_pipe);
 
   // |Dispatcher| public methods:
   Type GetType() const override;
@@ -37,7 +37,7 @@
   Deserialize(Channel* channel, const void* source, size_t size);
 
   // Get access to the |DataPipe| for testing.
-  DataPipe* GetDataPipeForTest();
+  DataPipe* GetDataPipeForTest() { return data_pipe_.get(); }
 
  private:
   DataPipeProducerDispatcher();
@@ -64,18 +64,16 @@
                                 HandleSignalsState* signals_state) override;
   void StartSerializeImplNoLock(Channel* channel,
                                 size_t* max_size,
-                                size_t* max_platform_handles) override
-      MOJO_NOT_THREAD_SAFE;
+                                size_t* max_platform_handles) override;
   bool EndSerializeAndCloseImplNoLock(
       Channel* channel,
       void* destination,
       size_t* actual_size,
-      embedder::PlatformHandleVector* platform_handles) override
-      MOJO_NOT_THREAD_SAFE;
+      embedder::PlatformHandleVector* platform_handles) override;
   bool IsBusyNoLock() const override;
 
-  // This will be null if closed.
-  scoped_refptr<DataPipe> data_pipe_ MOJO_GUARDED_BY(mutex());
+  // Protected by |lock()|:
+  scoped_refptr<DataPipe> data_pipe_;  // This will be null if closed.
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(DataPipeProducerDispatcher);
 };