Fix license headers in a number of files

tools/memory_watcher/memory_hook.cc

-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012 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.
 
 // Static class for hooking Win32 API routines.
 
 // Some notes about how to hook Memory Allocation Routines in Windows.
 //
 // For our purposes we do not hook the libc routines.  There are two
 // reasons for this.  First, the libc routines all go through HeapAlloc
 // anyway.  So, it's redundant to log both HeapAlloc and malloc.
@@ skipping 541 matching lines @@
 }
 
 void MemoryHook::OnUntrack(HANDLE heap, int32 id, int32 size) {
   // Don't notify about allocations to our internal heap.
   if (heap == heap_)
     return;
 
   if (watcher_)
     watcher_->OnUntrack(heap, id, size);
 }