Fixes for re-enabling more MSVC level 4 warnings: misc edition #2

skia/ext/pixel_ref_utils_unittest.cc

Index: skia/ext/pixel_ref_utils_unittest.cc
diff --git a/skia/ext/pixel_ref_utils_unittest.cc b/skia/ext/pixel_ref_utils_unittest.cc
index bddbe657934d7f5e5a5f6c01193ef148594d72eb..65e18835c61740b4f8a2aaa2891a43303132cdc1 100644
--- a/skia/ext/pixel_ref_utils_unittest.cc
+++ b/skia/ext/pixel_ref_utils_unittest.cc
@@ -31,15 +31,7 @@ class TestDiscardableShader : public SkShader {
     CreateBitmap(gfx::Size(50, 50), "discardable", &bitmap_);
   }
 
-  TestDiscardableShader(SkFlattenableReadBuffer& flattenable_buffer) {
-    SkOrderedReadBuffer& buffer =
-        static_cast<SkOrderedReadBuffer&>(flattenable_buffer);
-    SkReader32* reader = buffer.getReader32();
-
-    reader->skip(-4);
-    uint32_t toSkip = reader->readU32();
-    reader->skip(toSkip);
-
+  TestDiscardableShader(SkReadBuffer& buffer) : SkShader(buffer) {
     CreateBitmap(gfx::Size(50, 50), "discardable", &bitmap_);
   }