Revert 158830 - Revert 156678 - Native messaging now uses the MessageService back-end.

Revert 158830 - Revert 156678 - Native messaging now uses the MessageService back-end.

Reason: Regression in a ChromeOS extension causing it to continue running after
unloading.

BUG=142915
Review URL: https://codereview.chromium.org/10818013

TBR=eaugusti@chromium.org
TBR=mpcomplete@chromium.org
TBR=mmoss, rouslan
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=158833

[Isaac (away), 2012-09-26 18:38:58]

This caused widespread compile failures on the tree (i.e. http://goo.gl/OrILM)

Error below:


In file included from chrome/browser/extensions/message_handler.cc:8:0:
./chrome/browser/extensions/api/messaging/message_service.h:15:81: fatal error:
chrome/browser/extensions/api/messaging/native_message_process_host.h: No such
file or directory
compilation terminated.
make: ***
[out/Debug/obj.target/browser_extensions/chrome/browser/extensions/message_handler.o]
Error 1
In file included from chrome/browser/extensions/extension_system.cc:28:0:
./chrome/browser/extensions/api/messaging/message_service.h:15:81: fatal error:
chrome/browser/extensions/api/messaging/native_message_process_host.h: No such
file or directory
compilation terminated.
make: ***
[out/Debug/obj.target/browser_extensions/chrome/browser/extensions/extension_system.o]
Error 1
In file included from chrome/browser/extensions/test_extension_system.cc:9:0:
./chrome/browser/extensions/api/messaging/message_service.h:15:81: fatal error:
chrome/browser/extensions/api/messaging/native_message_process_host.h: No such
file or directory
compilation terminated.
make: ***
[out/Debug/obj.target/test_support_common/chrome/browser/extensions/test_extension_system.o]
Error 1

[Isaac (away), 2012-09-26 18:39:51]

err, I mean 158830 caused errors.  This revert was clean.