Enabling 64-bit mojo shell to launch 32-bit child to handle nonsfi content.

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 b0bc6ad997593bdf4c53c925fc571ecb5f8f1261..7de4602d681e1f881404a4d0a62e463a36faf10c 100644
--- a/shell/child_process_host.cc
+++ b/shell/child_process_host.cc
@@ -42,11 +42,14 @@ ChildProcessHost::~ChildProcessHost() {
   DCHECK(!child_process_.IsValid());
 }
 
-void ChildProcessHost::Start() {
+void ChildProcessHost::Start(bool require_32_bit) {
   DCHECK(!child_process_.IsValid());
 
   scoped_ptr<LaunchData> launch_data(new LaunchData());
-  launch_data->child_path = context_->mojo_shell_child_path();
+  if (require_32_bit)
+    launch_data->child_path = context_->mojo_shell_child_path_32_bit();
+  else
+    launch_data->child_path = context_->mojo_shell_child_path();
 
   // TODO(vtl): Add something for |slave_info|.
   // TODO(vtl): The "unretained this" is wrong (see also below).