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

src/gpu/GrLayerAtlas.h

Index: src/gpu/GrLayerAtlas.h
diff --git a/src/gpu/GrLayerAtlas.h b/src/gpu/GrLayerAtlas.h
index e84667b5ea02cec6b8ca4e2cb9b75c84a896da24..ae08e4527ba6738cba02b2a73986028d2a3d832d 100644
--- a/src/gpu/GrLayerAtlas.h
+++ b/src/gpu/GrLayerAtlas.h
@@ -9,13 +9,15 @@
 #ifndef GrLayerAtlas_DEFINED
 #define GrLayerAtlas_DEFINED
 
-#include "GrTexture.h"
+#include "GrTypes.h"
 
 #include "SkPoint.h"
+#include "SkSize.h"
 #include "SkTDArray.h"
 #include "SkTInternalLList.h"
 
 class GrLayerAtlas;
+class GrTexture;
 class GrTextureProvider;
 class GrRectanizer;
 
@@ -107,22 +109,9 @@
     // nullptr is returned if there is no more space in the atlas.
     Plot* addToAtlas(ClientPlotUsage*, int width, int height, SkIPoint16* loc);
 
-    GrTexture* getTextureOrNull() const {
+    GrTexture* getTexture() const {
         return fTexture;
     }
-
-    GrTexture* getTexture() const {
-        SkASSERT(fTexture);
-        return fTexture;
-    }
-
-    bool reattachBackingTexture();
-
-    void detachBackingTexture() {
-        fTexture.reset(nullptr);
-    }
-
-    void resetPlots();
 
     enum IterOrder {
         kLRUFirst_IterOrder,
@@ -138,14 +127,12 @@
     }
 
 private:
-    void createBackingTexture();
-
     void makeMRU(Plot* plot);
 
     GrTextureProvider* fTexProvider;
     GrPixelConfig      fPixelConfig;
     GrSurfaceFlags     fFlags;
-    SkAutoTUnref<GrTexture> fTexture;
+    GrTexture*         fTexture;
 
     SkISize            fBackingTextureSize;