Convert //ios from scoped_ptr to std::unique_ptr.

ios/chrome/browser/find_in_page/js_findinpage_manager.mm

 // Copyright 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.
 
 #import "ios/chrome/browser/find_in_page/js_findinpage_manager.h"
 
+#include <memory>
 #include <string>
 
 #import "base/ios/weak_nsobject.h"
 #include "base/json/json_reader.h"
 #include "base/json/string_escape.h"
 #include "base/logging.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/values.h"
 #import "ios/chrome/browser/find_in_page/find_in_page_model.h"
 
 namespace {
 
 // Global variable defined in find_in_page.js that can be used for testing
 // whether JavaScript bas heen loaded.
 NSString* const kFindInPageBeacon = @"window.__gCrWeb.findInPage";
 
@@ skipping 142 matching lines @@
 #pragma mark -
 #pragma mark FindInPageEntry
 
 - (BOOL)processFindInPageResult:(NSString*)result
                  scrollPosition:(CGPoint*)point {
   if (!result)
     return NO;
 
   // Parse JSONs.
   std::string json([result UTF8String]);
-  scoped_ptr<base::Value> root(base::JSONReader::Read(json, false));
+  std::unique_ptr<base::Value> root(base::JSONReader::Read(json, false));
   if (!root.get())
     return YES;
   if (!root->IsType(base::Value::TYPE_LIST))
     return YES;
 
   base::ListValue* resultList = static_cast<base::ListValue*>(root.get());
   DCHECK(resultList);
   if (resultList) {
     if (resultList->GetSize() == 2) {
       int numHighlighted = 0;
@@ skipping 27 matching lines @@
       [self processFindInPageResult:result scrollPosition:&point];
   completionHandler(processFIPResult, point);
 }
 
 - (void)updateIndex:(NSInteger)index atPoint:(CGPoint)point {
   [findInPageModel_ updateIndex:index atPoint:point];
 }
 
 - (FindInPageEntry)findInPageEntryForJson:(NSString*)jsonStr {
   std::string json([jsonStr UTF8String]);
-  scoped_ptr<base::Value> root(base::JSONReader::Read(json, false));
+  std::unique_ptr<base::Value> root(base::JSONReader::Read(json, false));
   if (!root.get())
     return kFindInPageEntryZero;
 
   if (!root->IsType(base::Value::TYPE_LIST))
     return kFindInPageEntryZero;
 
   base::ListValue* position = static_cast<base::ListValue*>(root.get());
   return [self entryForListValue:position];
 }
 
@@ skipping 27 matching lines @@
 
 - (NSString*)scriptPath {
   return @"find_in_page";
 }
 
 - (NSString*)presenceBeacon {
   return kFindInPageBeacon;
 }
 
 @end