Rename RCTContextExecutor to RCTJSCExecutor

Summary:
public

Rename the executor to so it actually says something about the implementation.

Reviewed By: jspahrsummers, nicklockwood

Differential Revision: D2759688

fb-gh-sync-id: 5b1ac447e75109fbbc2ee71c804710d9926785aa

React/Executors/RCTJSCExecutor.h

@@ -0,0 +1,32 @@
+/**
+ * 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 <JavaScriptCore/JavaScriptCore.h>
+
+#import "RCTJavaScriptExecutor.h"
+
+/**
+ * Uses a JavaScriptCore context as the execution engine.
+ */
+@interface RCTJSCExecutor : NSObject <RCTJavaScriptExecutor>
+
+/**
+ * Configures the executor to run JavaScript on a specific thread with a given JS context.
+ * You probably don't want to use this; use -init instead.
+ */
+- (instancetype)initWithJavaScriptThread:(NSThread *)javaScriptThread
+                                 context:(JSContext *)context NS_DESIGNATED_INITIALIZER;
+
+/**
+ * Like -[initWithJavaScriptThread:context:] but uses JSGlobalContextRef from JavaScriptCore's C API.
+ */
+- (instancetype)initWithJavaScriptThread:(NSThread *)javaScriptThread
+                        globalContextRef:(JSGlobalContextRef)contextRef;
+
+@end