[PATCH] Add an optional mapping from source paths to source contents.

[Manuel Klimek]

  Yes. I'm not sure how useful getAllCompileCommands is anyway (it was somebody else who really wanted that), as for large enough build systems it basically always is the wrong choice - if anything, we should provide a layer to "run sharded on all files in the compilation database", which then could create processes and parallelity as needed. Calling getAllCompileCommands seems almost always like the wrong approach (unless you know you have a small project).

http://llvm-reviews.chandlerc.com/D2121