Fix nits

skia/ext/SkThread_chrome.cc

-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2010 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.
 
 #include "third_party/skia/include/core/SkThread.h"
 
 #include <new>
 
 #include "base/atomicops.h"
 #include "base/basictypes.h"
 #include "base/lock.h"
 #include "base/logging.h"
 
 int32_t sk_atomic_inc(int32_t* addr) {
   // sk_atomic_inc is expected to return the old value, Barrier_AtomicIncrement
   // returns the new value.
   return base::subtle::Barrier_AtomicIncrement(addr, 1) - 1;
 }
 
 int32_t sk_atomic_dec(int32_t* addr) {
-  // sk_atomic_inc is expected to return the old value, Barrier_AtomicIncrement
+  // sk_atomic_dec is expected to return the old value, Barrier_AtomicIncrement
   // returns the new value.
   return base::subtle::Barrier_AtomicIncrement(addr, -1) + 1;
 }
 
 SkMutex::SkMutex(bool isGlobal) : fIsGlobal(isGlobal) {
   COMPILE_ASSERT(sizeof(Lock) <= sizeof(fStorage), Lock_is_too_big_for_SkMutex);
   Lock* lock = reinterpret_cast<Lock*>(fStorage);
   new(lock) Lock();
 }
 
 SkMutex::~SkMutex() {
   Lock* lock = reinterpret_cast<Lock*>(fStorage);
   lock->~Lock();
 }
 
 void SkMutex::acquire() {
   Lock* lock = reinterpret_cast<Lock*>(fStorage);
   lock->Acquire();
 }
 
 void SkMutex::release() {
   Lock* lock = reinterpret_cast<Lock*>(fStorage);
   lock->Release();
 }