Fix layer hoisting image filter corner cases

tests/GpuLayerCacheTest.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.
 */
 
 #if SK_SUPPORT_GPU
 
 #include "GrContext.h"
@@ skipping 25 matching lines @@
                           GrLayerCache* cache,
                           const SkPicture& picture,
                           unsigned numToAdd,
                           unsigned idOffset) {
 
     for (unsigned i = 0; i < numToAdd; ++i) {
         unsigned indices[1] = { idOffset+i+1 };
         GrCachedLayer* layer = cache->findLayerOrCreate(picture.uniqueID(), 
                                                         idOffset+i+1, idOffset+i+2, 
                                                         SkIRect::MakeEmpty(),
+                                                        SkIRect::MakeEmpty(),
                                                         SkMatrix::I(),
                                                         indices, 1,
                                                         NULL);
         REPORTER_ASSERT(reporter, layer);
         GrCachedLayer* temp = TestingAccess::Find(cache, picture.uniqueID(), SkMatrix::I(), 
                                                   indices, 1);
         REPORTER_ASSERT(reporter, temp == layer);
 
         REPORTER_ASSERT(reporter, TestingAccess::NumLayers(cache) == idOffset + i + 1);
 
@@ skipping 184 matching lines @@
 
         picture.reset(NULL);
         cache.processDeletedPictures();
 
         REPORTER_ASSERT(reporter, TestingAccess::NumLayers(&cache) == 0);
         // TODO: add VRAM/resource cache check here
     }
 }
 
 #endif