Clean up ExternalProtocolHandler code.

Change-Id: I2bbe2154f8be8e727b7adad8ff809ff1668c55df
Reviewed-on: https://chromium-review.googlesource.com/683235
Commit-Queue: Lei Zhang <[email protected]>
Reviewed-by: Mustafa Emre Acer <[email protected]>
Cr-Commit-Position: refs/heads/master@{#504286}
1 file changed