Clean up Cloud Print API flow code.

chrome/browser/printing/cloud_print/gcd_api_flow.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_PRINTING_CLOUD_PRINT_GCD_API_FLOW_H_
 #define CHROME_BROWSER_PRINTING_CLOUD_PRINT_GCD_API_FLOW_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 29 matching lines @@
     virtual void OnGCDApiFlowComplete(const base::DictionaryValue& value) = 0;
 
     virtual GURL GetURL() = 0;
 
     virtual std::string GetOAuthScope() = 0;
 
     virtual net::URLFetcher::RequestType GetRequestType();
 
     virtual std::vector<std::string> GetExtraRequestHeaders() = 0;
 
-    // If there is no data, set upload_type and upload_data to ""
-    virtual void GetUploadData(std::string* upload_type,
-                               std::string* upload_data);
-
    private:
     DISALLOW_COPY_AND_ASSIGN(Request);
   };
 
   GCDApiFlow();
   virtual ~GCDApiFlow();
 
   static std::unique_ptr<GCDApiFlow> Create(
       net::URLRequestContextGetter* request_context,
       OAuth2TokenService* token_service,
@@ skipping 14 matching lines @@
   std::string GetOAuthScope() override;
   std::vector<std::string> GetExtraRequestHeaders() override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(CloudPrintApiFlowRequest);
 };
 
 }  // namespace cloud_print
 
 #endif  // CHROME_BROWSER_PRINTING_CLOUD_PRINT_GCD_API_FLOW_H_