Remove base::StringValue

ios/chrome/browser/ui/reader_mode/reader_mode_checker.mm

 // 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.
 
 #import "ios/chrome/browser/ui/reader_mode/reader_mode_checker.h"
 
 #include "base/logging.h"
 #include "base/strings/sys_string_conversions.h"
 #include "components/dom_distiller/core/distillable_page_detector.h"
 #include "components/dom_distiller/core/experiments.h"
@@ skipping 100 matching lines @@
   // references a weak pointer.
   base::WeakPtr<ReaderModeChecker> weak_this(weak_factory_.GetWeakPtr());
   [receiver
       executeJavaScript:extract_features_js
       completionHandler:^(id result, NSError* error) {
         if (!weak_this || error || ![result isKindOfClass:[NSString class]]) {
           return;  // Inconclusive.
         }
         const dom_distiller::DistillablePageDetector* detector =
             dom_distiller::DistillablePageDetector::GetDefault();
-        const base::StringValue value(base::SysNSStringToUTF8(result));
+        const base::Value value(base::SysNSStringToUTF8(result));
         std::vector<double> features(
             dom_distiller::CalculateDerivedFeaturesFromJSON(&value));
         if (detector->Classify(features)) {
           weak_this->is_distillable_ = Status::kSwitchPossible;
           for (auto& observer : weak_this->observers_)
             observer.PageIsDistillable();
         } else {
           weak_this->is_distillable_ = Status::kSwitchMaybe;
         }
       }];
@@ skipping 30 matching lines @@
 
 void ReaderModeChecker::AddObserver(ReaderModeCheckerObserver* observer) {
   DCHECK(!observers_.HasObserver(observer));
   observers_.AddObserver(observer);
 }
 
 void ReaderModeChecker::RemoveObserver(ReaderModeCheckerObserver* observer) {
   DCHECK(observers_.HasObserver(observer));
   observers_.RemoveObserver(observer);
 }