Add support for JSC's sampling profiler on iOS for RN

Reviewed By: javache

Differential Revision: D4107919

fbshipit-source-id: ecfe2cacdb78b857e461f7006b29e4d1fe1a1862

React/Modules/JSCSamplingProfiler.h

@@ -0,0 +1,23 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+#import <Foundation/Foundation.h>
+
+#import "RCTBridgeModule.h"
+
+@interface JSCSamplingProfiler : NSObject <RCTBridgeModule>
+
+/**
+ * Receives a JSON string containing the result of a JSC CPU Profiling run,
+ *  and sends them to the packager to be symbolicated and saved to disk.
+ * It is safe to call this method from any thread.
+ */
+- (void)operationCompletedWithResults:(NSString *)results;
+
+@end