add ability to specify the DPI at which to render the page

Review URL: https://codereview.chromium.org/19000004

git-svn-id: http://skia.googlecode.com/svn/trunk@10009 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/samplecode/SamplePdfFileViewer.cpp b/samplecode/SamplePdfFileViewer.cpp
index fecc153..fc8b0f0 100644
--- a/samplecode/SamplePdfFileViewer.cpp
+++ b/samplecode/SamplePdfFileViewer.cpp
@@ -46,7 +46,7 @@
         if (renderer.loaded()) {
             pic = SkNEW(SkPicture);
             SkCanvas* canvas = pic->beginRecording((int)renderer.MediaBox(0).width(), (int)renderer.MediaBox(0).height());
-            renderer.renderPage(0, canvas);
+            renderer.renderPage(0, canvas, renderer.MediaBox(0));
             pic->endRecording();
         }
         return pic;