[PDF] Start from an identity transform for drawDevice.

drawDevice, like drawSprite should start from the identity transform instead of applying the passed translation on top of the current transform.

Review URL: http://codereview.appspot.com/4023066

git-svn-id: http://skia.googlecode.com/svn/trunk@757 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/include/pdf/SkPDFFormXObject.h b/include/pdf/SkPDFFormXObject.h
index 6a16709..8cd33f3 100644
--- a/include/pdf/SkPDFFormXObject.h
+++ b/include/pdf/SkPDFFormXObject.h
@@ -41,9 +41,8 @@
     /** Create a PDF form XObject. Entries for the dictionary entries are
      *  automatically added.
      *  @param device      The set of graphical elements on this form.
-     *  @param matrix      The mapping from user space to form space.
      */
-    SkPDFFormXObject(SkPDFDevice* device, const SkMatrix& matrix);
+    explicit SkPDFFormXObject(SkPDFDevice* device);
     virtual ~SkPDFFormXObject();
 
     // The SkPDFObject interface.