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

shell/child_process_host_unittest.cc

 // Copyright 2014 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.
 
 // Note: This file also partly tests child_main.*.
 
 #include "shell/child_process_host.h"
 
 #include "base/logging.h"
 #include "base/macros.h"
@@ skipping 31 matching lines @@
 #define MAYBE_StartJoin StartJoin
 #endif  // defined(OS_ANDROID)
 // Just tests starting the child process and joining it (without starting an
 // app).
 TEST(ChildProcessHostTest, MAYBE_StartJoin) {
   Context context;
   base::MessageLoop message_loop(
       scoped_ptr<base::MessagePump>(new mojo::common::MessagePumpMojo()));
   context.Init();
   TestChildProcessHost child_process_host(&context);
-  child_process_host.Start();
+  bool require_32_bit = false;
+  child_process_host.Start(require_32_bit);

[Mark Seaborn, 2015/09/14 18:38:58]

Alternative style is:
child_process_host.Start(false /* require_32_bit */);

[Sean Klein, 2015/09/15 18:37:50]

Done.

   message_loop.Run();  // This should run until |DidStart()|.
   child_process_host.ExitNow(123);
   int exit_code = child_process_host.Join();
   VLOG(2) << "Joined child: exit_code = " << exit_code;
   EXPECT_EQ(123, exit_code);
 
   context.Shutdown();
 }
 
 #if defined(OS_ANDROID)
 // TODO(qsr): Multiprocess shell tests are not supported on android.
 #define MAYBE_ConnectionError DISABLED_ConnectionError
 #else
 #define MAYBE_ConnectionError ConnectionError
 #endif  // defined(OS_ANDROID)
 // Tests that even on connection error, the callback to |StartApp()| will get
 // called.
 TEST(ChildProcessHostTest, MAYBE_ConnectionError) {
   Context context;
   base::MessageLoop message_loop(
       scoped_ptr<base::MessagePump>(new mojo::common::MessagePumpMojo()));
   context.Init();
   TestChildProcessHost child_process_host(&context);
-  child_process_host.Start();
+  bool require_32_bit = false;
+  child_process_host.Start(require_32_bit);
   message_loop.Run();  // This should run until |DidStart()|.
   // Send |ExitNow()| first, so that the |StartApp()| below won't actually be
   // processed, and we'll just get a connection error.
   child_process_host.ExitNow(123);
   mojo::MessagePipe mp;
   mojo::InterfaceRequest<mojo::Application> application_request;
   application_request.Bind(mp.handle0.Pass());
   // This won't actually be called, but the callback should be run.
   MojoResult result = MOJO_RESULT_INTERNAL;
   child_process_host.StartApp("/does_not_exist/cbvgyuio",
                               application_request.Pass(), [&result](int32_t r) {
                                 result = r;
                                 base::MessageLoop::current()->QuitWhenIdle();
                               });
   message_loop.Run();
   EXPECT_EQ(MOJO_RESULT_UNKNOWN, result);
   int exit_code = child_process_host.Join();
   VLOG(2) << "Joined child: exit_code = " << exit_code;
   EXPECT_EQ(123, exit_code);
 
   context.Shutdown();
 }
 
 }  // namespace
 }  // namespace shell