Fast path translate() in SkCanvas and SkLiteDL.

include/core/SkCanvas.h

Index: include/core/SkCanvas.h
diff --git a/include/core/SkCanvas.h b/include/core/SkCanvas.h
index a32d27b4d9c2c9f502e179b23c2f60a8e60a7f52..52a322576e6ad55d40e2beb43b75c5d24625e137 100644
--- a/include/core/SkCanvas.h
+++ b/include/core/SkCanvas.h
@@ -1352,6 +1352,9 @@ protected:
     virtual void didRestore() {}
     virtual void didConcat(const SkMatrix&) {}
     virtual void didSetMatrix(const SkMatrix&) {}
+    virtual void didTranslate(SkScalar dx, SkScalar dy) {
+        this->didConcat(SkMatrix::MakeTrans(dx, dy));
+    }
 
 #ifdef SK_EXPERIMENTAL_SHADOWING
     virtual void didTranslateZ(SkScalar) {}