Revert of Make SkPixelRef::isLocked() debug-only, remove related dead code.

src/core/SkPixelRef.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkPixelRef.h"
 #include "SkThread.h"
 
@@ skipping 179 matching lines @@
 }
 
 bool SkPixelRef::lockPixelsAreWritable() const {
     return this->onLockPixelsAreWritable();
 }
 
 bool SkPixelRef::onLockPixelsAreWritable() const {
     return true;
 }
 
+bool SkPixelRef::onImplementsDecodeInto() {
+    return false;
+}
+
+bool SkPixelRef::onDecodeInto(int pow2, SkBitmap* bitmap) {
+    return false;
+}
+
 uint32_t SkPixelRef::getGenerationID() const {
     if (0 == fGenerationID) {
         fGenerationID = SkNextPixelRefGenerationID();
         fUniqueGenerationID = true;  // The only time we can be sure of this!
     }
     return fGenerationID;
 }
 
 void SkPixelRef::addGenIDChangeListener(GenIDChangeListener* listener) {
     if (NULL == listener || !fUniqueGenerationID) {
@@ skipping 47 matching lines @@
 
 bool SkPixelRef::onGetYUV8Planes(SkISize sizes[3], void* planes[3], size_t rowBytes[3],
                                  SkYUVColorSpace* colorSpace) {
     return false;
 }
 
 size_t SkPixelRef::getAllocatedSizeInBytes() const {
     return 0;
 }