Add missing include to SkPictureContentInfo.

src/core/SkPictureContentInfo.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkPictureContentInfo_DEFINED
 #define SkPictureContentInfo_DEFINED
 
+#include "SkTDArray.h"
+
 class GrContext;
 
 class SkPictureContentInfo {
 public:
     SkPictureContentInfo() { this->reset(); }
     SkPictureContentInfo(const SkPictureContentInfo& src) { this->set(src); }
 
     int numOperations() const { return fNumOperations; }
     bool hasText() const { return fNumTexts > 0; }
 
@@ skipping 57 matching lines @@
         // Did the current save or saveLayer contain another saveLayer.
         // Percolated back down the save stack.
         kContainedSaveLayer_Flag = 0x4
     };
 
     // Stack of save vs saveLayer information to track nesting
     SkTDArray<uint32_t> fSaveStack;
 };
 
 #endif