Use SkPathJoin and SkBasename in Pdfviewer.

Remove redundant code.

R=edisonn@google.com

Review URL: https://codereview.chromium.org/68263003

git-svn-id: http://skia.googlecode.com/svn/trunk@12240 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed