Add new GM for occluded blurmask filter draws

tools/sk_tool_utils.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 sk_tool_utils_DEFINED
 #define sk_tool_utils_DEFINED
 
@@ skipping 114 matching lines @@
 
     void create_tetra_normal_map(SkBitmap* bm, const SkIRect& dst);
 
     void make_big_path(SkPath& path);
 
     // Return a blurred version of 'src'. This doesn't use a separable filter
     // so it is slow!
     SkBitmap slow_blur(const SkBitmap& src, float sigma);
 
     SkRect compute_central_occluder(const SkRRect& rr);
+    SkRect compute_widest_occluder(const SkRRect& rr);
+    SkRect compute_tallest_occluder(const SkRRect& rr);
 
     // A helper object to test the topological sorting code (TopoSortBench.cpp & TopoSortTest.cpp)
     class TopoTestNode {
     public:
         TopoTestNode(int id) : fID(id), fOutputPos(-1), fTempMark(false) { }
 
         void dependsOn(TopoTestNode* src) {
             *fDependencies.append() = src;
         }
 
@@ skipping 74 matching lines @@
         int  fID;
         int  fOutputPos;
         bool fTempMark;
 
         SkTDArray<TopoTestNode*> fDependencies;
     };
 
 }  // namespace sk_tool_utils
 
 #endif  // sk_tool_utils_DEFINED