Fix a typo in a comment.

base/lazy_instance.h

 // Copyright (c) 2008 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.
 
 // The LazyInstance<Type, Traits> class manages a single instance of Type,
 // which will be lazily created on the first time it's accessed.  This class is
 // useful for places you would normally use a function-level static, but you
 // need to have guaranteed thread-safety.  The Type constructor will only ever
 // be called once, even if two threads are racing to create the object.  Get()
 // and Pointer() will always return the same, completely initialized instance.
 // When the instance is constructed it is registered with AtExitManager.  The
 // destructor will be called on program exit.
 //
 // LazyInstance is completely thread safe, assuming that you create it safely.
 // The class was designed to be POD initialized, so it shouldn't require a
 // static constructor.  It really only makes sense to declare a LazyInstance as
 // a global variable using the base::LinkerInitialized constructor.
 //
 // LazyInstance is similar to Singleton, except it does not have the singleton
 // property.  You can have multiple LazyInstance's of the same type, and each
 // will manage a unique instance.  It also preallocates the space for Type, as
 // to avoid allocating the Type instance on the heap.  This may help with the
 // performance of creating the instance, and reducing heap fragmentation.  This
 // requires that Type be a complete type so we can determine the size.
 //
 // Example usage:
-//   static LazyInstance<MyClass> my_instance(base::LINKER_INITALIZED);
+//   static LazyInstance<MyClass> my_instance(base::LINKER_INITIALIZED);
 //   void SomeMethod() {
 //     my_instance.Get().SomeMethod();  // MyClass::SomeMethod()
 // 
 //     MyClass* ptr = my_instance.Pointer();
 //     ptr->DoDoDo();  // MyClass::DoDoDo
 //   }
 
 #ifndef BASE_LAZY_INSTANCE_H_
 #define BASE_LAZY_INSTANCE_H_
 
@@ skipping 63 matching lines @@
 
  private:
   int8 buf_[sizeof(Type)];  // Preallocate the space for the Type instance.
 
   DISALLOW_COPY_AND_ASSIGN(LazyInstance);
 };
 
 }  // namespace base
 
 #endif  // BASE_LAZY_INSTANCE_H_