Remove linked_ptr from gin_java_base_object.h/cc

BUG=556939

Review-Url: https://codereview.chromium.org/2430803003
Cr-Commit-Position: refs/heads/master@{#427059}

content/browser/android/java/gin_java_bound_object.cc

@@ -183,8 +183,8 @@ void GinJavaBoundObject::EnsureMethodsAreSetUp() {
         continue;
     }
 
-    JavaMethod* method = new JavaMethod(java_method);
-    methods_.insert(std::make_pair(method->name(), make_linked_ptr(method)));
+    std::unique_ptr<JavaMethod> method(new JavaMethod(java_method));
+    methods_.insert(std::make_pair(method->name(), std::move(method)));
   }
 }
 

content/browser/android/java/gin_java_bound_object.h

@@ -9,11 +9,11 @@
 #include <stdint.h>
 
 #include <map>
+#include <memory>
 #include <set>
 
 #include "base/android/jni_weak_ref.h"
 #include "base/android/scoped_java_ref.h"
-#include "base/memory/linked_ptr.h"
 #include "base/memory/ref_counted.h"
 #include "base/values.h"
 #include "content/browser/android/java/java_method.h"
@@ -79,7 +79,7 @@ class GinJavaBoundObject
   std::set<int32_t> holders_;
 
   // The following fields are accessed on the background thread.
-  typedef std::multimap<std::string, linked_ptr<JavaMethod> > JavaMethodMap;
+  using JavaMethodMap = std::multimap<std::string, std::unique_ptr<JavaMethod>>;
   JavaMethodMap methods_;
   jmethodID object_get_class_method_id_;
   bool are_methods_set_up_;