Remove unsigned < signed comparison.

include/gpu/GrTypes.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 GrTypes_DEFINED
 #define GrTypes_DEFINED
 
@@ skipping 162 matching lines @@
     kARGB_GrMaskFormat,  //!< 4-bytes per pixel, color format
 
     kLast_GrMaskFormat = kARGB_GrMaskFormat
 };
 static const int kMaskFormatCount = kLast_GrMaskFormat + 1;
 
 /**
  *  Return the number of bytes-per-pixel for the specified mask format.
  */
 static inline int GrMaskFormatBytesPerPixel(GrMaskFormat format) {
-    SkASSERT((unsigned)format < kMaskFormatCount);
+    SkASSERT(format < kMaskFormatCount);
     // kA8   (0) -> 1
     // kA565 (1) -> 2
     // kARGB (2) -> 4
     static const int sBytesPerPixel[] = { 1, 2, 4 };
     static_assert(SK_ARRAY_COUNT(sBytesPerPixel) == kMaskFormatCount, "array_size_mismatch");
     static_assert(kA8_GrMaskFormat == 0, "enum_order_dependency");
     static_assert(kA565_GrMaskFormat == 1, "enum_order_dependency");
     static_assert(kARGB_GrMaskFormat == 2, "enum_order_dependency");
 
     return sBytesPerPixel[(int) format];
@@ skipping 444 matching lines @@
             return 4 * width * height;
     }
 }
 
 /**
  * This value translates to reseting all the context state for any backend.
  */
 static const uint32_t kAll_GrBackendState = 0xffffffff;
 
 #endif