Remove offset to SkMallocPixelRef::NewWithData - use SkData::NewSubset instead.

R=scroggo@google.com, mtklein@google.com, reed@google.com

Author: halcanary@google.com

Review URL: https://codereview.chromium.org/243483002

git-svn-id: http://skia.googlecode.com/svn/trunk@14289 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tests/MallocPixelRefTest.cpp b/tests/MallocPixelRefTest.cpp
index 5c28ac8..cf5e054 100644
--- a/tests/MallocPixelRefTest.cpp
+++ b/tests/MallocPixelRefTest.cpp
@@ -104,11 +104,10 @@
         SkData* dataPtr = data.get();
         REPORTER_ASSERT(reporter, dataPtr->unique());
         SkAutoTUnref<SkMallocPixelRef> pr(
-            SkMallocPixelRef::NewWithData(info, rowBytes, NULL, data.get(), 4));
+            SkMallocPixelRef::NewWithData(info, rowBytes, NULL, data.get()));
         REPORTER_ASSERT(reporter, !(dataPtr->unique()));
         data.reset(NULL);
         REPORTER_ASSERT(reporter, dataPtr->unique());
-        REPORTER_ASSERT(reporter,
-            static_cast<const void*>(dataPtr->bytes() + 4) == pr->pixels());
+        REPORTER_ASSERT(reporter, dataPtr->data() == pr->pixels());
     }
 }