Add an Android-framework-only stable ID to SkPixelRef.

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 69 matching lines @@
 
 // just need a > 0 value, so pick a funny one to aid in debugging
 #define SKPIXELREF_PRELOCKED_LOCKCOUNT     123456789
 
 static SkImageInfo validate_info(const SkImageInfo& info) {
     SkAlphaType newAlphaType = info.alphaType();
     SkAssertResult(SkColorTypeValidateAlphaType(info.colorType(), info.alphaType(), &newAlphaType));
     return info.makeAlphaType(newAlphaType);
 }
 
-SkPixelRef::SkPixelRef(const SkImageInfo& info) : fInfo(validate_info(info)) {
+SkPixelRef::SkPixelRef(const SkImageInfo& info)
+    : fInfo(validate_info(info))
+#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK
+    , fStableID(SkNextPixelRefGenerationID())
+#endif
+
+{
     this->setMutex(NULL);
     fRec.zero();
     fLockCount = 0;
     this->needsNewGenID();
     fIsImmutable = false;
     fPreLocked = false;
 }
 
 
-SkPixelRef::SkPixelRef(const SkImageInfo& info, SkBaseMutex* mutex) : fInfo(validate_info(info)) {
+SkPixelRef::SkPixelRef(const SkImageInfo& info, SkBaseMutex* mutex)
+    : fInfo(validate_info(info))
+#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK
+    , fStableID(SkNextPixelRefGenerationID())
+#endif
+{
     this->setMutex(mutex);
     fRec.zero();
     fLockCount = 0;
     this->needsNewGenID();
     fIsImmutable = false;
     fPreLocked = false;
 }
 
 SkPixelRef::~SkPixelRef() {
     this->callGenIDChangeListeners();
@@ skipping 155 matching lines @@
 
 #ifdef SK_BUILD_FOR_ANDROID
 void SkPixelRef::globalRef(void* data) {
     this->ref();
 }
 
 void SkPixelRef::globalUnref() {
     this->unref();
 }
 #endif