Remove unused emptyContentVerifierKey constructor

extensions/browser/content_verifier_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.
 
 #ifndef EXTENSIONS_BROWSER_CONTENT_VERIFIER_DELEGATE_H_
 #define EXTENSIONS_BROWSER_CONTENT_VERIFIER_DELEGATE_H_
 
 #include <stdint.h>
 
 #include <set>
 
 #include "extensions/browser/content_verify_job.h"
 #include "url/gurl.h"
 
 namespace base {
 class FilePath;
 class Version;
 }
 
 namespace extensions {
 
 class Extension;
 
 // A pointer to the bytes of a public key, and the number of bytes.
 struct ContentVerifierKey {
   const uint8_t* data;
   int size;
 
-  ContentVerifierKey() : data(NULL), size(0) {}
-
-  ContentVerifierKey(const uint8_t* data, int size) {
-    this->data = data;
-    this->size = size;
-  }
+  ContentVerifierKey(const uint8_t* data, int size) : data(data), size(size) {}
 };
 
 // This is an interface for clients that want to use a ContentVerifier.
 class ContentVerifierDelegate {
  public:
   // Note that it is important for these to appear in increasing "severity"
   // order, because we use this to let command line flags increase, but not
   // decrease, the mode you're running in compared to the experiment group.
   enum Mode {
     // Do not try to fetch content hashes if they are missing, and do not
@@ skipping 34 matching lines @@
 
   // Called when the content verifier detects that a read of a file inside
   // an extension did not match its expected hash.
   virtual void VerifyFailed(const std::string& extension_id,
                             ContentVerifyJob::FailureReason reason) = 0;
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_CONTENT_VERIFIER_DELEGATE_H_