Safari opens pdf in browser window, but doesn't auto rotate and there is no control bar
I think you are using OS X Preview in Safari.
Note: If you don't have Acrobat or Reader, or haven't installed the PDFViewer plug-in, then Safari shows PDF files using the Mac OS X native PDF support.
Solution 1
Get Adobe Reader XI (11.0.02) installed, inclusive the browser plugin. Now Safari will open the .PDF files in Adobe Reader, and you can easily modify what you see (e.g. rotate the documents).
Solution 2
Try right click (or two fingers click on my MacBook Air) on the PDF document, that should open a window to rotate the document.