Documentation: Clarify that runtime.sendMessage does not notify itself

chrome/common/extensions/docs/templates/articles/nativeMessaging.html

Index: chrome/common/extensions/docs/templates/articles/nativeMessaging.html
diff --git a/chrome/common/extensions/docs/templates/articles/nativeMessaging.html b/chrome/common/extensions/docs/templates/articles/nativeMessaging.html
index c3f2cb00b3f5e7d1714872093835f90dcf9b0698..b5e0c7bec564bccc7ed10f8b81612ddd76c824f1 100644
--- a/chrome/common/extensions/docs/templates/articles/nativeMessaging.html
+++ b/chrome/common/extensions/docs/templates/articles/nativeMessaging.html
@@ -46,8 +46,9 @@ following fields:
   </tr>
   <tr>
     <td><code>path</code></td>
-    <td>Path to the native messaging host binary. On Linux and OSX the path must
-    be absolute. On Windows it can be relative to the directory in which the
+    <td>Path to the native messaging host binary. On Windows the path must be
+    absolute, on Linux and OSX the path can be absolute or relative to the

[Devlin, 2016/08/23 16:30:34]

I don't think this is right - it looks like we do absolutify windows paths and
error out on posix.  We could probably tweak posix to handle relative, too, but
I think right now the documentation is accurate.

https://chromium.googlesource.com/chromium/src/+/c963c714c99f34bd80b392d9896c...

[robwu, 2016/08/24 06:49:42]

You're right, fixed!

+    directory in which the
     manifest file is located. The host process is started with the current
     directory set to the directory that contains the host binary. For example if
     this parameter is set to <code>C:\Application\nm_host.exe</code> then it
@@ -221,8 +222,8 @@ Here are some errors and tips for solving the issues:
       syntax correct and do the values match the definition of a
       <a href="#native-messaging-host-manifest">native messaging host manifest</a>?
     <li>
-      Does the file specified in <code>path</code> exist? On Windows, paths
-      may be relative, but on OS X and Linux, the paths must be absolute.
+      Does the file specified in <code>path</code> exist? On Linux and OS X the
+      path may be relative, but on Windows the path must be absolute.
   </ul>
 
   <dt>Native messaging host <em>host name</em> is not registered. (Windows-only)