Fix bug in layer hoisting transition to SkRecord backend

src/gpu/GrLayerCache.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrAtlas.h"
 #include "GrGpu.h"
 #include "GrLayerCache.h"
@@ skipping 101 matching lines @@
     fAtlas.free();
     // GrLayerCache always assumes an atlas exists so recreate it. The atlas 
     // lazily allocates a replacement texture so reallocating a new 
     // atlas here won't disrupt a GrContext::abandonContext or freeGpuResources.
     // TODO: Make GrLayerCache lazily allocate the atlas manager?
     this->initAtlas();
 }
 
 GrCachedLayer* GrLayerCache::createLayer(uint32_t pictureID, 
                                          int start, int stop, 
+                                         const SkIPoint& offset,
                                          const SkMatrix& ctm) {
     SkASSERT(pictureID != SK_InvalidGenID && start > 0 && stop > 0);
 
-    GrCachedLayer* layer = SkNEW_ARGS(GrCachedLayer, (pictureID, start, stop, ctm));
+    GrCachedLayer* layer = SkNEW_ARGS(GrCachedLayer, (pictureID, start, stop, offset, ctm));
     fLayerHash.add(layer);
     return layer;
 }
 
 GrCachedLayer* GrLayerCache::findLayer(uint32_t pictureID,
                                        int start, int stop, 
+                                       const SkIPoint& offset,
                                        const SkMatrix& ctm) {
     SkASSERT(pictureID != SK_InvalidGenID && start > 0 && stop > 0);
-    return fLayerHash.find(GrCachedLayer::Key(pictureID, start, stop, ctm));
+    return fLayerHash.find(GrCachedLayer::Key(pictureID, start, stop, offset, ctm));
 }
 
 GrCachedLayer* GrLayerCache::findLayerOrCreate(uint32_t pictureID,
                                                int start, int stop,
+                                               const SkIPoint& offset,
                                                const SkMatrix& ctm) {
     SkASSERT(pictureID != SK_InvalidGenID && start > 0 && stop > 0);
-    GrCachedLayer* layer = fLayerHash.find(GrCachedLayer::Key(pictureID, start, stop, ctm));
+    GrCachedLayer* layer = fLayerHash.find(GrCachedLayer::Key(pictureID, start, stop, offset, ctm));
     if (NULL == layer) {
-        layer = this->createLayer(pictureID, start, stop, ctm);
+        layer = this->createLayer(pictureID, start, stop, offset, ctm);
     }
 
     return layer;
 }
 
 bool GrLayerCache::lock(GrCachedLayer* layer, const GrTextureDesc& desc, bool dontAtlas) {
     SkDEBUGCODE(GrAutoValidateLayer avl(fAtlas->getTexture(), layer);)
 
     if (layer->locked()) {
         // This layer is already locked
@@ skipping 260 matching lines @@
 
 void GrLayerCache::processDeletedPictures() {
     SkTDArray<GrPictureDeletedMessage> deletedPictures;
     fPictDeletionInbox.poll(&deletedPictures);
 
     for (int i = 0; i < deletedPictures.count(); i++) {
         this->purge(deletedPictures[i].pictureID);
     }
 }