Move SkPdfContext into its own files.

experimental/PdfViewer/SkPdfGraphicsState.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkPdfGraphicsState_DEFINED
 #define SkPdfGraphicsState_DEFINED
 
 #include "SkCanvas.h"
 #include "SkPaint.h"
 #include "SkPdfConfig.h"
 #include "SkPdfUtils.h"
-#include "SkTDStackNester.h"
 
-class SkPdfAllocator;
 class SkPdfFont;
-class SkPdfDoc;
-class SkPdfNativeDoc;
 class SkPdfNativeObject;
 class SkPdfResourceDictionary;
 class SkPdfSoftMaskDictionary;
 
 /** \class SkPdfColorOperator
  *   Operates on stroking or non-stroking properties.
  */
 class SkPdfColorOperator {
 
     /*
@@ skipping 42 matching lines @@
         fColorSpace.fBuffer = (const unsigned char*)"Pattern";
         fColorSpace.fBytes = 7;  // strlen("Pattern")
         fPattern = pattern;
     }
 
     void applyGraphicsState(SkPaint* paint) {
         paint->setColor(SkColorSetA(fColor, (U8CPU)(fOpacity * 255)));
     }
 };
 
-/** \class SkTDStackNester
+/**
  *   Operates on stroking or non-stroking properties.
  */
 struct SkPdfGraphicsState {
     // TODO(edisonn): deprecate and remove these!
     double              fCurPosX;
     double              fCurPosY;
 
     double              fCurFontSize;
     bool                fTextBlock;
     SkPdfFont*          fSkFont;
@@ skipping 254 matching lines @@
         fDashPhase    = 0;
         fBlendModesLength = 1;
         fBlendModes[0] = SkXfermode::kSrc_Mode;  // PDF: Normal Blend mode
         fSMask        = NULL;
     }
 
     // TODO(edisonn): make two functions instead, stroking and non stoking, avoid branching
     void applyGraphicsState(SkPaint* paint, bool stroking);
 };
 
-/** \class SkPdfContext
- *   The context of the drawing. The document we draw from, the current stack of objects, ...
- */
-class SkPdfContext {
-public:
-    SkTDStackNester<SkPdfNativeObject*>  fObjectStack;
-    SkTDStackNester<SkPdfGraphicsState>  fStateStack;
-    SkPdfGraphicsState              fGraphicsState;
-    SkPdfNativeDoc*                 fPdfDoc;
-    SkPdfAllocator*                 fTmpPageAllocator;
-    SkMatrix                        fOriginalMatrix;
-
-    SkPdfContext(SkPdfNativeDoc* doc);
-    ~SkPdfContext();
-};
-
 #endif  // SkPdfGraphicsState_DEFINED