SkPDF: Simplify PDFStream / emitObject() const

src/pdf/SkPDFGraphicState.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkData.h"
 #include "SkLazyPtr.h"
 #include "SkPDFCanon.h"
@@ skipping 177 matching lines @@
 SK_DECLARE_STATIC_LAZY_PTR(SkPDFDict,
                            noSMaskGraphicState,
                            create_no_smask_graphic_state,
                            unref<SkPDFDict>);
 
 // static
 SkPDFDict* SkPDFGraphicState::GetNoSMaskGraphicState() {
     return SkRef(noSMaskGraphicState.get());
 }
 
-void SkPDFGraphicState::emitObject(SkWStream* stream,
-                                   const SkPDFObjNumMap& objNumMap,
-                                   const SkPDFSubstituteMap& substitutes) {
+void SkPDFGraphicState::emitObject(
+        SkWStream* stream,
+        const SkPDFObjNumMap& objNumMap,
+        const SkPDFSubstituteMap& substitutes) const {
     SkAutoTUnref<SkPDFDict> dict(SkNEW_ARGS(SkPDFDict, ("ExtGState")));
     dict->insertName("Type", "ExtGState");
 
     SkScalar alpha = SkIntToScalar(fAlpha) / 0xFF;
     dict->insertScalar("CA", alpha);
     dict->insertScalar("ca", alpha);
 
     SkPaint::Cap strokeCap = (SkPaint::Cap)fStrokeCap;
     SkPaint::Join strokeJoin = (SkPaint::Join)fStrokeJoin;
     SkXfermode::Mode xferMode = (SkXfermode::Mode)fMode;
@@ skipping 11 matching lines @@
     SK_COMPILE_ASSERT(SkPaint::kJoinCount == 3, paint_join_mismatch);
     SkASSERT(strokeJoin >= 0 && strokeJoin <= 2);
     dict->insertInt("LJ", strokeJoin);
 
     dict->insertScalar("LW", fStrokeWidth);
     dict->insertScalar("ML", fStrokeMiter);
     dict->insertBool("SA", true);  // SA = Auto stroke adjustment.
     dict->insertName("BM", as_blend_mode(xferMode));
     dict->emitObject(stream, objNumMap, substitutes);
 }