Create WebSocketTransportClientSocketPool

base/containers/linked_list.h

Index: base/containers/linked_list.h
diff --git a/base/containers/linked_list.h b/base/containers/linked_list.h
index 25bbe762cb759b4eba6c67b00ec0206c3e6bec4f..41461ff365e66fdbd568e2dcd3a96b7d212378ae 100644
--- a/base/containers/linked_list.h
+++ b/base/containers/linked_list.h
@@ -5,6 +5,8 @@
 #ifndef BASE_CONTAINERS_LINKED_LIST_H_
 #define BASE_CONTAINERS_LINKED_LIST_H_
 
+#include "base/macros.h"
+
 // Simple LinkedList type. (See the Q&A section to understand how this
 // differs from std::list).
 //
@@ -82,7 +84,7 @@ namespace base {
 template <typename T>
 class LinkNode {
  public:
-  LinkNode() : previous_(0), next_(0) {}
+  LinkNode() : previous_(NULL), next_(NULL) {}
   LinkNode(LinkNode<T>* previous, LinkNode<T>* next)
       : previous_(previous), next_(next) {}
 
@@ -106,6 +108,10 @@ class LinkNode {
   void RemoveFromList() {
     this->previous_->next_ = this->next_;
     this->next_->previous_ = this->previous_;
+    // next() and previous() return non-NULL if and only this node is not in any
+    // list.
+    this->next_ = NULL;
+    this->previous_ = NULL;
   }
 
   LinkNode<T>* previous() const {
@@ -128,6 +134,8 @@ class LinkNode {
  private:
   LinkNode<T>* previous_;
   LinkNode<T>* next_;
+
+  DISALLOW_COPY_AND_ASSIGN(LinkNode);
 };
 
 template <typename T>
@@ -155,8 +163,12 @@ class LinkedList {
     return &root_;
   }
 
+  bool empty() const { return head() == end(); }
+
  private:
   LinkNode<T> root_;
+
+  DISALLOW_COPY_AND_ASSIGN(LinkedList);
 };
 
 }  // namespace base