Update Layer Hoisting to store its atlas texture in the resource cache

src/gpu/GrLayerHoister.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 "GrLayerCache.h"
 #include "GrLayerHoister.h"
 #include "GrRecordReplaceDraw.h"
@@ skipping 304 matching lines @@
 
     SkImageFilter::DeviceProxy proxy(device);
     const SkBitmap src = wrap_texture(layer->texture());
 
     if (!layer->filter()->filterImage(&proxy, src, filterContext, &filteredBitmap, &offset)) {
         // Filtering failed. Press on with the unfiltered version.
         return;
     }
 
     SkIRect newRect = SkIRect::MakeWH(filteredBitmap.width(), filteredBitmap.height());
-    layer->setTexture(filteredBitmap.getTexture(), newRect);
+    layer->setTexture(filteredBitmap.getTexture(), newRect, false);
     layer->setOffset(offset);
 }
 
 void GrLayerHoister::DrawLayers(GrContext* context, const SkTDArray<GrHoistedLayer>& layers) {
     for (int i = 0; i < layers.count(); ++i) {
         GrCachedLayer* layer = layers[i].fLayer;
         const SkBigPicture* pict = layers[i].fPicture->asSkBigPicture();
         if (!pict) {
             // TODO: can we assume / assert this?
             continue;
@@ skipping 37 matching lines @@
                                   const SkTDArray<GrHoistedLayer>& layers) {
     GrLayerCache* layerCache = context->getLayerCache();
 
     for (int i = 0; i < layers.count(); ++i) {
         layerCache->removeUse(layers[i].fLayer);
     }
 
     SkDEBUGCODE(layerCache->validate();)
 }
 
-void GrLayerHoister::PurgeCache(GrContext* context) {
+void GrLayerHoister::Begin(GrContext* context) {
+    GrLayerCache* layerCache = context->getLayerCache();
+
+    layerCache->begin();
+}
+
+void GrLayerHoister::End(GrContext* context) {
+    GrLayerCache* layerCache = context->getLayerCache();
+
 #if !GR_CACHE_HOISTED_LAYERS
-    GrLayerCache* layerCache = context->getLayerCache();
 
     // This code completely clears out the atlas. It is required when
     // caching is disabled so the atlas doesn't fill up and force more
     // free floating layers
     layerCache->purgeAll();
 #endif
+
+    layerCache->end();
 }