Added Header and Footer support using Skia

skia/ext/vector_platform_device_skia.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef SKIA_EXT_VECTOR_PLATFORM_DEVICE_SKIA_H_
 #define SKIA_EXT_VECTOR_PLATFORM_DEVICE_SKIA_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/logging.h"
@@ skipping 61 matching lines @@
                               const SkPath& path, const SkMatrix* matrix,
                               const SkPaint& paint);
   virtual void drawVertices(const SkDraw& draw, SkCanvas::VertexMode,
                             int vertexCount, const SkPoint verts[],
                             const SkPoint texs[], const SkColor colors[],
                             SkXfermode* xmode, const uint16_t indices[],
                             int indexCount, const SkPaint& paint);
   virtual void drawDevice(const SkDraw& draw, SkDevice*, int x, int y,
                           const SkPaint&);
 
+  // Sets the drawing area for the device. Subsequent draw calls are
+  // directed to the specific drawing area (margin or content area).
+  SK_API void setDrawingArea(SkPDFDevice::DrawingArea area);
+
  protected:
-  virtual SkDevice* onCreateCompatibleDevice(SkBitmap::Config, int width, 
+  virtual SkDevice* onCreateCompatibleDevice(SkBitmap::Config, int width,
                                              int height, bool isOpaque,
                                              Usage usage);
 
  private:
   SkRefPtr<SkPDFDevice> pdf_device_;
   SkRefPtr<BitmapPlatformDevice> raster_surface_;
 
   DISALLOW_COPY_AND_ASSIGN(VectorPlatformDeviceSkia);
 };
 
 }  // namespace skia
 
 #endif  // SKIA_EXT_VECTOR_PLATFORM_DEVICE_SKIA_H_