Google's search results have long included a "View as HTML" option tacked next to PDF files it indexed. Now it's increasingly just "View", as the native viewer app used in Google Docs is available for quick document scans.
Google's converting PDFs to PNG files for faster loading and skimming, but you can still search for individual words inside the viewer. The pages of a PDF can be viewed in page-by-page or grid alignments, and there's still a "Plain HTML" click option for those who like the stripped-down versions. Google seems to be gradually indexing PDFs for its viewer, so some files may still have only the HTML option until the spiders from Mountain View do their work.
Google's PDF Viewer for Search Results [Google Operating System]