Add CHECK in case PathProviderAndroid is failing.
Add CHECK in case PathProviderAndroid is failing.

In bug 600226, RenderProcessHost::Init() is returning
false. The only possible cause I can see is if the path
service returned false, so see if PathProviderAndroid
is returning false.

BUG=600226

Review URL: https://codereview.chromium.org/1914983002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#389468}

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