rename SkBitmapChecksummer as SkBitmapHasher, and prepare for it to possibly use

tests/ChecksumTest.cpp

Index: tests/ChecksumTest.cpp
===================================================================
--- tests/ChecksumTest.cpp	(revision 8638)
+++ tests/ChecksumTest.cpp	(working copy)
@@ -7,11 +7,8 @@
  */
 #include "Test.h"
 
-#include "SkBitmap.h"
-#include "SkBitmapChecksummer.h"
 #include "SkChecksum.h"
 #include "SkCityHash.h"
-#include "SkColor.h"
 
 // Word size that is large enough to hold results of any checksum type.
 typedef uint64_t checksum_result;
@@ -107,15 +104,6 @@
             return result;
         }
 
-        // Fill in bitmap with test data.
-        void CreateTestBitmap(SkBitmap &bitmap, SkBitmap::Config config, int width, int height,
-                              SkColor color) {
-            bitmap.setConfig(config, width, height);
-            REPORTER_ASSERT(fReporter, bitmap.allocPixels());
-            bitmap.setIsOpaque(true);
-            bitmap.eraseColor(color);
-        }
-
         void RunTest() {
             // Test self-consistency of checksum algorithms.
             fWhichAlgorithm = kSkChecksum;
@@ -156,25 +144,6 @@
                 GetTestDataChecksum(128) == GetTestDataChecksum(256));
             REPORTER_ASSERT(fReporter,
                 GetTestDataChecksum(132) == GetTestDataChecksum(260));
-
-            // Test SkBitmapChecksummer
-            SkBitmap bitmap;
-            // initial test case
-            CreateTestBitmap(bitmap, SkBitmap::kARGB_8888_Config, 333, 555, SK_ColorBLUE);
-            REPORTER_ASSERT(fReporter,
-                            SkBitmapChecksummer::Compute64(bitmap) == 0x18f9df68b1b02f38ULL);
-            // same pixel data but different dimensions should yield a different checksum
-            CreateTestBitmap(bitmap, SkBitmap::kARGB_8888_Config, 555, 333, SK_ColorBLUE);
-            REPORTER_ASSERT(fReporter,
-                            SkBitmapChecksummer::Compute64(bitmap) == 0x6b0298183f786c8eULL);
-            // same dimensions but different color should yield a different checksum
-            CreateTestBitmap(bitmap, SkBitmap::kARGB_8888_Config, 555, 333, SK_ColorGREEN);
-            REPORTER_ASSERT(fReporter,
-                            SkBitmapChecksummer::Compute64(bitmap) == 0xc6b4b3f6fadaaf37ULL);
-            // same pixel colors in a different config should yield the same checksum
-            CreateTestBitmap(bitmap, SkBitmap::kARGB_4444_Config, 555, 333, SK_ColorGREEN);
-            REPORTER_ASSERT(fReporter,
-                            SkBitmapChecksummer::Compute64(bitmap) == 0xc6b4b3f6fadaaf37ULL);
         }
 
         Reporter* fReporter;