Remove some dead NPAPI code after r363119.

content/child/multipart_response_delegate.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.
 //
 // A delegate class of WebURLLoaderImpl that handles multipart/x-mixed-replace
 // data.  We special case multipart/x-mixed-replace because WebCore expects a
 // separate didReceiveResponse for each new message part.
 //
 // Most of the logic and edge case handling are based on the Mozilla's
 // implementation in netwerk/streamconv/converters/nsMultiMixedConv.cpp.
@@ skipping 65 matching lines @@
   // Passed through from ResourceHandleInternal
   void OnReceivedData(const char* data, int data_len, int encoded_data_length);
   void OnCompletedRequest();
 
   // The request has been canceled, so stop making calls to the client.
   void Cancel() {
     client_ = NULL;
     loader_ = NULL;
   }
 
-  // Returns the multi part boundary string from the Content-type header
-  // in the response.
-  // Returns true on success.
-  static bool ReadMultipartBoundary(const blink::WebURLResponse& response,
-                                    std::string* multipart_boundary);
-
   // Returns the lower and higher content ranges from an individual multipart
   // in a multipart response.
   // Returns true on success.
   static bool ReadContentRanges(const blink::WebURLResponse& response,
                                 int64_t* content_range_lower_bound,
                                 int64_t* content_range_upper_bound,
                                 int64_t* content_range_instance_size);
 
  private:
   friend class MultipartResponseDelegateTester;  // For unittests.
@@ skipping 42 matching lines @@
 
   // true after we've sent our first response to the WebURLLoaderClient.
   bool has_sent_first_response_;
 
   DISALLOW_COPY_AND_ASSIGN(MultipartResponseDelegate);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_MULTIPART_RESPONSE_DELEGATE_H_