Revert "Implement chrome.platformKeys.getKeyPair()."

chrome/browser/extensions/api/platform_keys/platform_keys_api.h

 // Copyright 2015 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_EXTENSIONS_API_PLATFORM_KEYS_PLATFORM_KEYS_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_PLATFORM_KEYS_PLATFORM_KEYS_API_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 28 matching lines @@
 
   // Called when the certificates were selected. If an error occurred, |certs|
   // will be null and instead |error_message| be set.
   void OnSelectedCertificates(scoped_ptr<net::CertificateList> matches,
                               const std::string& error_message);
 
   DECLARE_EXTENSION_FUNCTION("platformKeysInternal.selectClientCertificates",
                              PLATFORMKEYSINTERNAL_SELECTCLIENTCERTIFICATES);
 };
 
-class PlatformKeysInternalGetPublicKeyFunction
-    : public ChromeUIThreadExtensionFunction {
- private:
-  ~PlatformKeysInternalGetPublicKeyFunction() override;
-  ResponseAction Run() override;
-
-  DECLARE_EXTENSION_FUNCTION("platformKeysInternal.getPublicKey",
-                             PLATFORMKEYSINTERNAL_GETPUBLICKEY);
-};
-
 class PlatformKeysInternalSignFunction
     : public ChromeUIThreadExtensionFunction {
  private:
   ~PlatformKeysInternalSignFunction() override;
   ResponseAction Run() override;
 
   // Called when the signature was generated. If an error occurred,
   // |signature| will be empty and instead |error_message| be set.
   void OnSigned(const std::string& signature, const std::string& error_message);
 
   DECLARE_EXTENSION_FUNCTION("platformKeysInternal.sign",
                              PLATFORMKEYSINTERNAL_SIGN);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_PLATFORM_KEYS_PLATFORM_KEYS_API_H_