Fix some bugs in our picture tools.

When doing tiled rendering in multiple threads, clone fPicture,
rather than the blank fPictureClones. Also fix a precedence
problem so we get the correct rectangle.

In render_pictures_main, call PictureRenderer::setup().

Review URL: https://codereview.appspot.com/6585055

git-svn-id: http://skia.googlecode.com/svn/trunk@5758 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tools/render_pictures_main.cpp b/tools/render_pictures_main.cpp
index 6066334..764bea0 100644
--- a/tools/render_pictures_main.cpp
+++ b/tools/render_pictures_main.cpp
@@ -102,6 +102,7 @@
              inputPath.c_str());
 
     renderer.init(&picture);
+    renderer.setup();
 
     SkString outputPath;
     make_output_filepath(&outputPath, outputDir, inputFilename);