Remove stl_util's deletion function use from chrome/browser/extensions/api/content_settings.

chrome/browser/extensions/api/content_settings/content_settings_store.h

Index: chrome/browser/extensions/api/content_settings/content_settings_store.h
diff --git a/chrome/browser/extensions/api/content_settings/content_settings_store.h b/chrome/browser/extensions/api/content_settings/content_settings_store.h
index f0f9e39bee280dc660aa552aa432f5960840d6f9..9ddf464daba39065576917450eed16fb18c2b875 100644
--- a/chrome/browser/extensions/api/content_settings/content_settings_store.h
+++ b/chrome/browser/extensions/api/content_settings/content_settings_store.h
@@ -6,7 +6,9 @@
 #define CHROME_BROWSER_EXTENSIONS_API_CONTENT_SETTINGS_CONTENT_SETTINGS_STORE_H_
 
 #include <map>
+#include <memory>
 #include <string>
+#include <vector>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
@@ -112,7 +114,7 @@ class ContentSettingsStore
 
   struct ExtensionEntry;
 
-  typedef std::multimap<base::Time, ExtensionEntry*> ExtensionEntryMap;
+  using ExtensionEntries = std::vector<std::unique_ptr<ExtensionEntry>>;
 
   virtual ~ContentSettingsStore();
 
@@ -129,10 +131,12 @@ class ContentSettingsStore
 
   bool OnCorrectThread();
 
-  ExtensionEntryMap::iterator FindEntry(const std::string& ext_id);
-  ExtensionEntryMap::const_iterator FindEntry(const std::string& ext_id) const;
+  ExtensionEntries::iterator FindEntry(const std::string& ext_id);
+  ExtensionEntries::const_iterator FindEntry(const std::string& ext_id) const;
 
-  ExtensionEntryMap entries_;
+  // The entries. Maintained in reverse-chronological order (newest items first)

[Devlin, 2016/12/14 15:54:01]

I wonder if the part about reverse-chronological order is more useful above the
using declaration?  Similar to how for we would suggest a comment above using x
= std::map<std::string, int> describing what the string and int are.

[Avi (use Gerrit), 2016/12/14 19:29:06]

Done.

+  // to facilitate search.
+  ExtensionEntries entries_;
 
   base::ObserverList<Observer, false> observers_;