Initial checkin of gRPC to third_party/

third_party/grpc/src/objective-c/RxLibrary/GRXWriteable.h

Index: third_party/grpc/src/objective-c/RxLibrary/GRXWriteable.h
diff --git a/third_party/WebKit/public/platform/WebMediaStreamCenter.h b/third_party/grpc/src/objective-c/RxLibrary/GRXWriteable.h
similarity index 55%
copy from third_party/WebKit/public/platform/WebMediaStreamCenter.h
copy to third_party/grpc/src/objective-c/RxLibrary/GRXWriteable.h
index b805d075a35ad720d9e56ae8ece728e8b2a26431..7fe805c6638978051a37ac3aae96a77bc7c5ab31 100644
--- a/third_party/WebKit/public/platform/WebMediaStreamCenter.h
+++ b/third_party/grpc/src/objective-c/RxLibrary/GRXWriteable.h
@@ -1,5 +1,7 @@
 /*
- * Copyright (C) 2012 Google Inc. All rights reserved.
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
@@ -26,40 +28,43 @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
  */
 
-#ifndef WebMediaStreamCenter_h
-#define WebMediaStreamCenter_h
-
-#include "WebVector.h"
-
-namespace blink {
+#import <Foundation/Foundation.h>
 
-class WebAudioSourceProvider;
-class WebMediaStream;
-class WebMediaStreamTrack;
-
-class WebMediaStreamCenter {
-public:
-    virtual ~WebMediaStreamCenter() { }
+/**
+ * A GRXWriteable is an object to which a sequence of values can be sent. The
+ * sequence finishes with an optional error.
+ */
+@protocol GRXWriteable <NSObject>
 
-    // Stream functionality.
-    virtual void didCreateMediaStream(WebMediaStream&) = 0;
-    virtual bool didAddMediaStreamTrack(const WebMediaStream&, const WebMediaStreamTrack&) = 0;
-    virtual bool didRemoveMediaStreamTrack(const WebMediaStream&, const WebMediaStreamTrack&) = 0;
-    virtual void didStopLocalMediaStream(const WebMediaStream&) = 0;
+/** Push the next value of the sequence to the receiving object. */
+- (void)writeValue:(id)value;
 
-    // Track functionality.
-    virtual void didCreateMediaStreamTrack(const WebMediaStreamTrack&) { }
-    virtual void didEnableMediaStreamTrack(const WebMediaStreamTrack&) { }
-    virtual void didDisableMediaStreamTrack(const WebMediaStreamTrack&) { }
-    virtual bool didStopMediaStreamTrack(const WebMediaStreamTrack&) { return false; }
+/**
+ * Signal that the sequence is completed, or that an error ocurred. After this
+ * message is sent to the instance, neither it nor writeValue: may be
+ * called again.
+ */
+- (void)writesFinishedWithError:(NSError *)errorOrNil;
+@end
 
-    // Caller must take the ownership of the returned |WebAudioSourceProvider| object.
-    virtual WebAudioSourceProvider* createWebAudioSourceFromMediaStreamTrack(const WebMediaStreamTrack&) { return nullptr; }
-};
+typedef void (^GRXValueHandler)(id value);
+typedef void (^GRXCompletionHandler)(NSError *errorOrNil);
+typedef void (^GRXSingleHandler)(id value, NSError *errorOrNil);
+typedef void (^GRXEventHandler)(BOOL done, id value, NSError *error);
 
-} // namespace blink
+/**
+ * Utility to create objects that conform to the GRXWriteable protocol, from
+ * blocks that handle each of the two methods of the protocol.
+ */
+@interface GRXWriteable : NSObject<GRXWriteable>
 
-#endif // WebMediaStreamCenter_h
++ (instancetype)writeableWithSingleHandler:(GRXSingleHandler)handler;
++ (instancetype)writeableWithEventHandler:(GRXEventHandler)handler;
 
+- (instancetype)initWithValueHandler:(GRXValueHandler)valueHandler
+                   completionHandler:(GRXCompletionHandler)completionHandler
+    NS_DESIGNATED_INITIALIZER;
+@end