Remove the remainder of the skia source code from the Chromium repo....

skia/ports/SkThread_none.cpp

-/* libs/graphics/ports/SkThread_none.cpp
-**
-** Copyright 2006, The Android Open Source Project
-**
-** Licensed under the Apache License, Version 2.0 (the "License"); 
-** you may not use this file except in compliance with the License. 
-** You may obtain a copy of the License at 
-**
-**     http://www.apache.org/licenses/LICENSE-2.0 
-**
-** Unless required by applicable law or agreed to in writing, software 
-** distributed under the License is distributed on an "AS IS" BASIS, 
-** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
-** See the License for the specific language governing permissions and 
-** limitations under the License.
-*/
-
-#include "SkThread.h"
-
-int32_t sk_atomic_inc(int32_t* addr)
-{
-    int32_t value = *addr;
-    *addr = value + 1;
-    return value;
-}
-
-int32_t sk_atomic_dec(int32_t* addr)
-{
-    int32_t value = *addr;
-    *addr = value - 1;
-    return value;
-}
-
-SkMutex::SkMutex(bool /* isGlobal */)
-{
-}
-
-SkMutex::~SkMutex()
-{
-}
-
-void SkMutex::acquire()
-{
-}
-
-void SkMutex::release()
-{
-}
-