Remove a SkImageDecoder reference from SkPicture.h

src/pdf/SkPDFDeviceFlattener.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkPDFDeviceFlattener.h"
 #include "SkDraw.h"
+#include "SkShader.h"
 
 static SkISize SkSizeToISize(const SkSize& size) {
     return SkISize::Make(SkScalarRoundToInt(size.width()), SkScalarRoundToInt(size.height()));
 }
 
 SkPDFDeviceFlattener::SkPDFDeviceFlattener(const SkSize& pageSize, const SkRect* trimBox)
             : SkPDFDevice(SkSizeToISize(pageSize),
                           SkSizeToISize(pageSize),
                           SkMatrix::I()) {
     // TODO(edisonn): store the trimbox on emit.
@@ skipping 125 matching lines @@
 bool SkPDFDeviceFlattener::mustFlatten(const SkDraw& d) const {
     // TODO(edisonn): testability, add flag to force return true.
     return d.fMatrix->hasPerspective();
 }
 
 bool SkPDFDeviceFlattener::mustPathText(const SkDraw& d, const SkPaint&) {
     // TODO(edisonn): testability, add flag to force return true.
     // TODO(edisonn): TBD: How to flatten MaskFilter.
     return d.fMatrix->hasPerspective();
 }