Fix the speeling of "purgeable" in Gr code

src/gpu/GrGpuResourceCacheAccess.h

 
 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGpuResourceCacheAccess_DEFINED
 #define GrGpuResourceCacheAccess_DEFINED
@@ skipping 68 matching lines @@
      * If the resource is cached make it uncached. Has no effect on resources that are wrapped or
      * already uncached. Furthermore, resources with content keys cannot be made unbudgeted.
      */
     void makeUnbudgeted() { fResource->makeUnbudgeted(); }
 
     /**
      * Called by the cache to delete the resource under normal circumstances.
      */
     void release() {
         fResource->release();
-        if (fResource->isPurgable()) {            
+        if (fResource->isPurgeable()) {            
             SkDELETE(fResource);
         }
     }
 
     /**
      * Called by the cache to delete the resource when the backend 3D context is no longer valid.
      */
     void abandon() {
         fResource->abandon();
-        if (fResource->isPurgable()) {            
+        if (fResource->isPurgeable()) {            
             SkDELETE(fResource);
         }
     }
 
 private:
     CacheAccess(GrGpuResource* resource) : fResource(resource) { }
     CacheAccess(const CacheAccess& that) : fResource(that.fResource) { }
     CacheAccess& operator=(const CacheAccess&); // unimpl
 
     // No taking addresses of this type.
     const CacheAccess* operator&() const;
     CacheAccess* operator&();
 
     GrGpuResource* fResource;
 
     friend class GrGpuResource; // to construct/copy this type.
 };
 
 inline GrGpuResource::CacheAccess GrGpuResource::cacheAccess() { return CacheAccess(this); }
 
 inline const GrGpuResource::CacheAccess GrGpuResource::cacheAccess() const {
     return CacheAccess(const_cast<GrGpuResource*>(this));
 }
 
 #endif