Images are written by PictureRenderer and not render_pictures_main.

Review URL: https://codereview.appspot.com/6448174

git-svn-id: http://skia.googlecode.com/svn/trunk@5216 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tools/PictureRenderer.h b/tools/PictureRenderer.h
index 4818457..cd6e18e 100644
--- a/tools/PictureRenderer.h
+++ b/tools/PictureRenderer.h
@@ -20,6 +20,7 @@
 class SkCanvas;
 class SkGLContext;
 class SkPicture;
+class SkString;
 
 namespace sk_tools {
 
@@ -37,10 +38,6 @@
     virtual void end();
     void resetState();
 
-    SkCanvas* getCanvas() {
-        return fCanvas.get();
-    }
-
     void setDeviceType(SkDeviceTypes deviceType) {
         fDeviceType = deviceType;
     }
@@ -71,6 +68,8 @@
 #endif
         {}
 
+    bool write(const SkString& path) const;
+
 protected:
     virtual void finishDraw();
     SkCanvas* setupCanvas();