Clean up a few more unused globals.

chrome/browser/extensions/api/declarative_webrequest/webrequest_condition_attribute.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/extensions/api/declarative_webrequest/webrequest_condition_attribute.h"
 
 #include <algorithm>
 
 #include "base/lazy_instance.h"
 #include "base/logging.h"
@@ skipping 20 matching lines @@
 using base::StringValue;
 using base::Value;
 
 namespace helpers = extension_web_request_api_helpers;
 namespace keys = extensions::declarative_webrequest_constants;
 
 namespace extensions {
 
 namespace {
 // Error messages.
-const char kUnknownConditionAttribute[] = "Unknown matching condition: '*'";
 const char kInvalidValue[] = "Condition '*' has an invalid value";
 
 struct WebRequestConditionAttributeFactory {
   DedupingFactory<WebRequestConditionAttribute> factory;
 
   WebRequestConditionAttributeFactory() : factory(5) {
     factory.RegisterFactoryMethod(
         keys::kResourceTypeKey,
         DedupingFactory<WebRequestConditionAttribute>::IS_PARAMETERIZED,
         &WebRequestConditionAttributeResourceType::Create);
@@ skipping 815 matching lines @@
 bool WebRequestConditionAttributeStages::Equals(
     const WebRequestConditionAttribute* other) const {
   if (!WebRequestConditionAttribute::Equals(other))
     return false;
   const WebRequestConditionAttributeStages* casted_other =
       static_cast<const WebRequestConditionAttributeStages*>(other);
   return allowed_stages_ == casted_other->allowed_stages_;
 }
 
 }  // namespace extensions