Initial checkin of gRPC to third_party/

third_party/grpc/src/objective-c/RxLibrary/private/GRXNSBlockEnumerator.h

Index: third_party/grpc/src/objective-c/RxLibrary/private/GRXNSBlockEnumerator.h
diff --git a/third_party/tcmalloc/chromium/src/google/malloc_extension_c.h b/third_party/grpc/src/objective-c/RxLibrary/private/GRXNSBlockEnumerator.h
similarity index 77%
copy from third_party/tcmalloc/chromium/src/google/malloc_extension_c.h
copy to third_party/grpc/src/objective-c/RxLibrary/private/GRXNSBlockEnumerator.h
index 87d727b3943433c83cb9d78cbf18f23bf8c4e211..fb50c37863a54d65b017dd57c61bed2b3c526f11 100644
--- a/third_party/tcmalloc/chromium/src/google/malloc_extension_c.h
+++ b/third_party/grpc/src/objective-c/RxLibrary/private/GRXNSBlockEnumerator.h
@@ -1,10 +1,12 @@
-/* Copyright (c) 2008, Google Inc.
+/*
+ *
+ * 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
  * met:
- * 
+ *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ -14,7 +16,7 @@
  *     * Neither the name of Google Inc. nor the names of its
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
@@ -26,9 +28,19 @@
  * 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.
+ *
  */
 
-/* The code has moved to gperftools/.  Use that include-directory for
- * new code.
+#import <Foundation/Foundation.h>
+
+/**
+ * Concrete subclass of NSEnumerator that delegates the invocations of nextObject to a block passed
+ * on initialization.
+ */
+@interface GRXNSBlockEnumerator : NSEnumerator
+/**
+ * The first time the passed block returns nil, the enumeration will end and the block will be
+ * released.
  */
-#include <gperftools/malloc_extension_c.h>
+- (instancetype)initWithValueSupplier:(id (^)())block;
+@end