GM: create GmResultDigest that encapsulates digest type ("bitmap-64bitMD5") and value (12345)

R=scroggo@google.com

Review URL: https://codereview.chromium.org/15883004

git-svn-id: http://skia.googlecode.com/svn/trunk@9271 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tests/BitmapHasherTest.cpp b/tests/BitmapHasherTest.cpp
index f7b297d..04de707 100644
--- a/tests/BitmapHasherTest.cpp
+++ b/tests/BitmapHasherTest.cpp
@@ -38,7 +38,7 @@
         void RunTest() {
             // Test SkBitmapHasher
             SkBitmap bitmap;
-            SkHashDigest digest;
+            uint64_t digest;
             // initial test case
             CreateTestBitmap(bitmap, SkBitmap::kARGB_8888_Config, 333, 555, SK_ColorBLUE);
             REPORTER_ASSERT(fReporter, SkBitmapHasher::ComputeDigest(bitmap, &digest));