Remove unused EME v0.1b MediaKeyError values.

media/base/media_keys.h

 // Copyright 2013 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 MEDIA_BASE_MEDIA_KEYS_H_
 #define MEDIA_BASE_MEDIA_KEYS_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/memory/scoped_ptr.h"
 #include "media/base/media_export.h"
 
 namespace media {
 
 // Performs media key operations.
 //
 // All key operations are called on the renderer thread. Therefore, these calls
 // should be fast and nonblocking; key events should be fired asynchronously.
 class MEDIA_EXPORT MediaKeys {
  public:
   // Reported to UMA, so never reuse a value!
   // Must be kept in sync with WebKit::WebMediaPlayerClient::MediaKeyErrorCode
   // (enforced in webmediaplayer_impl.cc).
   enum KeyError {
     kUnknownError = 1,
     kClientError,
-    kServiceError,
-    kOutputError,
-    kHardwareChangeError,
-    kDomainError,
+    // The following v0.1b values have never been used.
+    // kServiceError,
+    // kOutputError,
+    // kHardwareChangeError,
+    // kDomainError,
     kMaxKeyError  // Must be last and greater than any legit value.
   };
 
   MediaKeys();
   virtual ~MediaKeys();
 
   // Generates a key request for the |key_system| with |type| and
   // |init_data| provided.
   // Returns true if generating key request succeeded, false otherwise.
   // Note: AddKey() and CancelKeyRequest() should only be called after
@@ skipping 37 matching lines @@
 
 typedef base::Callback<void(const std::string& key_system,
                             const std::string& session_id,
                             const std::string& type,
                             scoped_ptr<uint8[]> init_data,
                             int init_data_size)> NeedKeyCB;
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_MEDIA_KEYS_H_