Eric Seidel a1bf7bae10 Make it possible to have multiple InspectorBackends
This will make it possible to connect a c++
inspector backend in addition to the JS one.

We lose the feature of running multiple inspector
servers in this patch, but we weren't using that feature
and could easily add it back if we plan to use it.

This patch has a *ton* of boilerplate code due
to crbug.com/431911, hopefully that will be fixed
soon and we can delete all the Impl nonsense.

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/710043004
2014-11-11 10:29:21 -08:00
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