Shell: Make a separate binary for child processes.

shell/context.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef SHELL_CONTEXT_H_
 #define SHELL_CONTEXT_H_
 
 #include <string>
 
 #include "base/macros.h"
@@ skipping 32 matching lines @@
 
   // Resolve an URL relative to the CWD mojo_shell was invoked from. This is a
   // nop for everything but relative file URLs or URLs without a scheme.
   GURL ResolveCommandLineURL(const std::string& path);
 
   // This must be called with a message loop set up for the current thread,
   // which must remain alive until after Shutdown() is called. Returns true on
   // success.
   bool Init();
 
+  // Like Init(), but specifies values for |mojo_shell_path()| and
+  // |mojo_shell_child_path()| explicitly.
+  bool InitWithPaths(const base::FilePath& shell_path,
+                     const base::FilePath& shell_child_path);
+
   // If Init() was called and succeeded, this must be called before destruction.
   void Shutdown();
 
   void Run(const GURL& url);
 
   ApplicationManager* application_manager() { return &application_manager_; }
   URLResolver* url_resolver() { return &url_resolver_; }
 
   // Available after Init():
   // These are absolute paths. |mojo_shell_path()| is really the path of the
@@ skipping 27 matching lines @@
   GURL shell_file_root_;
   GURL command_line_cwd_;
 
   DISALLOW_COPY_AND_ASSIGN(Context);
 };
 
 }  // namespace shell
 }  // namespace mojo
 
 #endif  // SHELL_CONTEXT_H_