EDK: Make PlatformChannelPair not depend/use on base::CommandLine.

shell/child_process_host.cc

Index: shell/child_process_host.cc
diff --git a/shell/child_process_host.cc b/shell/child_process_host.cc
index 4318bc1fd1b3057e3766a85cc869c03c1474f755..aef8570159470fea7b8f4d7b544e2e060f63dbe0 100644
--- a/shell/child_process_host.cc
+++ b/shell/child_process_host.cc
@@ -136,8 +136,11 @@ base::Process ChildProcessHost::DoLaunch(scoped_ptr<LaunchData> launch_data) {
                                        launch_data->child_connection_id);
 
   mojo::embedder::HandlePassingInformation handle_passing_info;
+  std::string platform_channel_info;
   launch_data->platform_channel_pair.PrepareToPassClientHandleToChildProcess(
-      &child_command_line, &handle_passing_info);
+      &platform_channel_info, &handle_passing_info);
+  child_command_line.AppendSwitchASCII(switches::kPlatformChannelHandleInfo,
+                                       platform_channel_info);
 
   base::LaunchOptions options;
   options.fds_to_remap = &handle_passing_info;