Re-enable ChannelMojo between Service process <-> service utility process.

Re-enable ChannelMojo between Service process <-> service utility process.

ChannelMojo between Service process <-> service utility process is
currently disabled because:
  -- Service process starts service utility process with a command line
     containing kMojoChannelToken switch but no kMojoApplicationChannelToken,
     because they are not in ServiceManager world now.
  -- But, service utility process(ChildThreadImpl) will disable ChannelMojo
     because of lack of kMojoApplicationChannelToken switch.

This CL lets ChildThreadImpl enable ChannelMojo also for a kMojoChannelToken
switch.

BUG=646833
TBR=ben@chromium.org

Review-Url: https://codereview.chromium.org/2366443004
Cr-Commit-Position: refs/heads/master@{#420566}
(cherry picked from commit 3cb38fd23571822bf08c79d90a0ec49ea486492a)

Committed: https://chromium.googlesource.com/chromium/src/+/93796f6bee4a682c742639a33d98fb836e3db20a

[Ken Rockot(use gerrit already), 2016-09-23 22:23:13]

Description was changed from

==========
Re-enable ChannelMojo between Service process <-> service utility process.

ChannelMojo between Service process <-> service utility process is
currently disabled because:
  -- Service process starts service utility process with a command line
     containing kMojoChannelToken switch but no kMojoApplicationChannelToken,
     because they are not in ServiceManager world now.
  -- But, service utility process(ChildThreadImpl) will disable ChannelMojo
     because of lack of kMojoApplicationChannelToken switch.

This CL lets ChildThreadImpl enable ChannelMojo also for a kMojoChannelToken
switch.

BUG=646833
TBR=ben@chromium.org

Review-Url: https://codereview.chromium.org/2366443004
Cr-Commit-Position: refs/heads/master@{#420566}
(cherry picked from commit 3cb38fd23571822bf08c79d90a0ec49ea486492a)
==========

to

==========
Re-enable ChannelMojo between Service process <-> service utility process.

ChannelMojo between Service process <-> service utility process is
currently disabled because:
  -- Service process starts service utility process with a command line
     containing kMojoChannelToken switch but no kMojoApplicationChannelToken,
     because they are not in ServiceManager world now.
  -- But, service utility process(ChildThreadImpl) will disable ChannelMojo
     because of lack of kMojoApplicationChannelToken switch.

This CL lets ChildThreadImpl enable ChannelMojo also for a kMojoChannelToken
switch.

BUG=646833
TBR=ben@chromium.org

Review-Url: https://codereview.chromium.org/2366443004
Cr-Commit-Position: refs/heads/master@{#420566}
(cherry picked from commit 3cb38fd23571822bf08c79d90a0ec49ea486492a)

Committed:
https://chromium.googlesource.com/chromium/src/+/93796f6bee4a682c742639a33d98...
==========

[Ken Rockot(use gerrit already), 2016-09-23 22:23:14]

Committed patchset #1 (id:1) manually as
93796f6bee4a682c742639a33d98fb836e3db20a (tree was closed).