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diff --git a/src/tools/mac/symupload/SymbolCollectorClient.h b/src/tools/mac/symupload/SymbolCollectorClient.h
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+++ b/src/tools/mac/symupload/SymbolCollectorClient.h
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+// Copyright (c) 2019, 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
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * 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
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// 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.
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ Represents a response from a sym-upload-v2 server to a CreateUploadURL call.
+ */
+@interface UploadURLResponse : NSObject {
+@protected
+  NSString* uploadURL_;
+  NSString* uploadKey_;
+}
+
+- (id)initWithUploadURL:(NSString*)uploadURL
+          withUploadKey:(NSString*)uploadKey;
+
+- (NSString*)uploadURL;
+- (NSString*)uploadKey;
+@end
+
+/**
+ Possible return statuses from a sym-upload-v2 server to a CompleteUpload call.
+ */
+typedef NS_ENUM(NSInteger, CompleteUploadResult) {
+  CompleteUploadResultOk,
+  CompleteUploadResultDuplicateData,
+  CompleteUploadResultError
+};
+
+/**
+ Possible return statuses from a sym-upload-v2 server to a CheckSymbolStatus
+ call.
+ */
+typedef NS_ENUM(NSInteger, SymbolStatus) {
+  SymbolStatusFound,
+  SymbolStatusMissing,
+  SymbolStatusUnknown
+};
+
+/**
+ Interface to help a client interact with a sym-upload-v2 server, over HTTP.
+ For details of the API and protocol, see :/docs/sym_upload_v2_protocol.md.
+ */
+@interface SymbolCollectorClient : NSObject;
+
+/**
+ Call the CheckSymbolstatus API on the server.
+ */
++ (SymbolStatus)CheckSymbolStatus:(NSString*)APIURL
+                       withAPIKey:(NSString*)APIKey
+                    withDebugFile:(NSString*)debugFile
+                      withDebugID:(NSString*)debugID;
+
+/**
+ Call the CreateUploadURL API on the server.
+ */
++ (UploadURLResponse*)CreateUploadURL:(NSString*)APIURL
+                           withAPIKey:(NSString*)APIKey;
+
+/**
+ Call the CompleteUpload API on the server.
+ */
++ (CompleteUploadResult)CompleteUpload:(NSString*)APIURL
+                            withAPIKey:(NSString*)APIKey
+                         withUploadKey:(NSString*)uploadKey
+                         withDebugFile:(NSString*)debugFile
+                           withDebugID:(NSString*)debugID;
+
+@end
+
+NS_ASSUME_NONNULL_END