Google Chrome 8 stable version released by Google with built-in PDF viewer secured in Chrome’s sandbox enabled by default and over 800 bugs fixed (that’s strange too many bugs) . With built-in PDF Viewer, you can able to view PDF files right from Google Chrome browser irrespective of PDF Reader installed in your Computer or not.
Chrome PDF Viewer allows to view, zoom, print, save fill in forms.
Read Chrome PDF Viewer features.
So PDF files opened in Chrome will be viewed through Chrome PDF Viewer than through PDF Reader installed in your Computer. To view your PDF files in PDF Reader plug-in for Chrome, you need to disable Chrome PDF Viewer.
No hint of Chrome Web store though, get ready for launch of Chrome Web Store.