SkPaint: eliminate some dead bytes in 64-bit build.

src/core/SkPaint.cpp

Index: src/core/SkPaint.cpp
diff --git a/src/core/SkPaint.cpp b/src/core/SkPaint.cpp
index 2449ed6793c241fa55ce5c0dfccc77ec72a34a7a..22f0dada7c93d0189ab06ec989ffc2460b5c5361 100644
--- a/src/core/SkPaint.cpp
+++ b/src/core/SkPaint.cpp
@@ -108,18 +108,30 @@ SkPaint::SkPaint() {
 }
 
 SkPaint::SkPaint(const SkPaint& src) {
-    memcpy(this, &src, sizeof(src));
-
-    SkSafeRef(fTypeface);
-    SkSafeRef(fPathEffect);
-    SkSafeRef(fShader);
-    SkSafeRef(fXfermode);
-    SkSafeRef(fMaskFilter);
-    SkSafeRef(fColorFilter);
-    SkSafeRef(fRasterizer);
-    SkSafeRef(fLooper);
-    SkSafeRef(fImageFilter);
-    SkSafeRef(fAnnotation);
+#define COPY(field) field = src.field
+#define REF_COPY(field) field = SkSafeRef(src.field)
+    COPY(fTextSize);
+    COPY(fTextScaleX);
+    COPY(fTextSkewX);
+    COPY(fColor);
+    COPY(fWidth);
+    COPY(fMiterLimit);
+
+    REF_COPY(fTypeface);
+    REF_COPY(fPathEffect);
+    REF_COPY(fShader);
+    REF_COPY(fXfermode);
+    REF_COPY(fMaskFilter);
+    REF_COPY(fColorFilter);
+    REF_COPY(fRasterizer);
+    REF_COPY(fLooper);
+    REF_COPY(fImageFilter);
+    REF_COPY(fAnnotation);
+
+    COPY(fBitfields);
+    COPY(fDirtyBits);
+#undef COPY
+#undef REF_COPY
 
 #ifdef SK_BUILD_FOR_ANDROID
     new (&fPaintOptionsAndroid) SkPaintOptionsAndroid(src.fPaintOptionsAndroid);