Add a way to save to PDF in SampleApp on Android and elsewhere.

In Android, add the PDF file to downloads, so it can be opened.

Reviewed at http://codereview.appspot.com/4638052/


git-svn-id: http://skia.googlecode.com/svn/trunk@1659 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/samplecode/SampleApp.h b/samplecode/SampleApp.h
index 25e3964..a58c688 100644
--- a/samplecode/SampleApp.h
+++ b/samplecode/SampleApp.h
@@ -60,6 +60,7 @@
     bool previousSample();
     bool handleTouch(int ownerId, float x, float y,
             SkView::Click::State state);
+    void saveToPdf();
 
 protected:
     virtual void onDraw(SkCanvas* canvas);
@@ -98,6 +99,9 @@
     };
     CanvasType fCanvasType;
 
+    bool fSaveToPdf;
+    SkCanvas* fPdfCanvas;
+
     bool fUseClip;
     bool fNClip;
     bool fRepeatDrawing;