Make GrAllocator Iter return non-const T

src/gpu/GrAllocator.h

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrAllocator_DEFINED
 #define GrAllocator_DEFINED
 
@@ skipping 124 matching lines @@
                 ++fBlockIndex;
                 fIndexInBlock = 0;
             }
             return fItemIndex < fAllocator->fCount;
         }
 
         /**
          * Gets the current iterator value. Call next() at least once before calling. Don't call
          * after next() returns false.
          */
-        const void* get() const {
+        void* get() const {
             SkASSERT(fItemIndex >= 0 && fItemIndex < fAllocator->fCount);
             return (char*) fAllocator->fBlocks[fBlockIndex] + fIndexInBlock * fAllocator->fItemSize;
         }
 
     private:
         const GrAllocator* fAllocator;
         int                fBlockIndex;
         int                fIndexInBlock;
         int                fItemIndex;
     };
@@ skipping 133 matching lines @@
 
         /**
          * Advances the iterator. Iteration is finished when next() returns false.
          */
         bool next() { return fImpl.next(); }
 
         /**
          * Gets the current iterator value. Call next() at least once before calling. Don't call
          * after next() returns false.
          */
-        const T* get() const { return (const T*) fImpl.get(); }
+        T* get() const { return (T*) fImpl.get(); }
 
         /**
          * Convenience operators. Same rules for calling apply as get().
          */
-        const T& operator*() const { return *this->get(); }
-        const T* operator->() const { return this->get(); }
+        T& operator*() const { return *this->get(); }
+        T* operator->() const { return this->get(); }
 
     private:
         GrAllocator::Iter fImpl;
     };
 
     /**
      * Access item by index.
      */
     T& operator[] (int i) {
         return *(T*)(fAllocator[i]);
@@ skipping 30 matching lines @@
 public:
     GrSTAllocator() : INHERITED(N) {
         this->setInitialBlock(fStorage.get());
     }
 
 private:
     SkAlignedSTStorage<N, T> fStorage;
 };
 
 #endif