Remove linked_ptr usage in //base.

extensions/browser/guest_view/web_view/web_view_find_helper.cc

Index: extensions/browser/guest_view/web_view/web_view_find_helper.cc
diff --git a/extensions/browser/guest_view/web_view/web_view_find_helper.cc b/extensions/browser/guest_view/web_view/web_view_find_helper.cc
index 725326a8cbd28e3f9fb47fd24ba21fc8a2e65dcd..48309aef86aa9bbb3f0b21de80dd438d77da1c06 100644
--- a/extensions/browser/guest_view/web_view/web_view_find_helper.cc
+++ b/extensions/browser/guest_view/web_view/web_view_find_helper.cc
@@ -22,12 +22,11 @@ WebViewFindHelper::~WebViewFindHelper() {
 }
 
 void WebViewFindHelper::CancelAllFindSessions() {
-  current_find_session_ = linked_ptr<WebViewFindHelper::FindInfo>();
   while (!find_info_map_.empty()) {
     find_info_map_.begin()->second->SendResponse(true /* canceled */);
     find_info_map_.erase(find_info_map_.begin());
   }
-  if (find_update_event_.get())
+  if (find_update_event_)
     DispatchFindUpdateEvent(true /* canceled */, true /* final_update */);
   find_update_event_.reset();
 }
@@ -100,8 +99,7 @@ void WebViewFindHelper::Find(
   std::pair<FindInfoMap::iterator, bool> insert_result =
       find_info_map_.insert(std::make_pair(
           current_find_request_id_,
-          linked_ptr<
-              WebViewFindHelper::FindInfo>(new WebViewFindHelper::FindInfo(
+          make_scoped_ptr(new WebViewFindHelper::FindInfo(
               current_find_request_id_, search_text, options, find_function))));
   // No duplicate insertions.
   DCHECK(insert_result.second);
@@ -110,7 +108,7 @@ void WebViewFindHelper::Find(
   blink::WebFindOptions* full_options = insert_result.first->second->options();
 
   // Set |findNext| implicitly.
-  if (current_find_session_.get()) {
+  if (current_find_session_) {
     const base::string16& current_search_text =
         current_find_session_->search_text();
     bool current_match_case = current_find_session_->options()->matchCase;
@@ -122,7 +120,7 @@ void WebViewFindHelper::Find(
   }
 
   // Link find requests that are a part of the same find session.
-  if (full_options->findNext && current_find_session_.get()) {
+  if (full_options->findNext && current_find_session_) {
     DCHECK(current_find_request_id_ != current_find_session_->request_id());
     current_find_session_->AddFindNextRequest(
         insert_result.first->second->AsWeakPtr());
@@ -130,7 +128,7 @@ void WebViewFindHelper::Find(
 
   // Update the current find session, if necessary.
   if (!full_options->findNext)
-    current_find_session_ = insert_result.first->second;
+    current_find_session_ = insert_result.first->second->AsWeakPtr();
 
   // Handle the empty |search_text| case internally.
   if (search_text.empty()) {
@@ -155,7 +153,7 @@ void WebViewFindHelper::FindReply(int request_id,
     return;
 
   // This find request must be a part of an existing find session.
-  DCHECK(current_find_session_.get());
+  DCHECK(current_find_session_);
 
   WebViewFindHelper::FindInfo* find_info = find_iterator->second.get();