Adds ability for chrome to behave as mojo_runner

mojo/shell/runner/host/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 tests child_process.*.
 
 #include "mojo/shell/runner/host/child_process_host.h"
 
+#include <utility>
+
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
 #include "base/run_loop.h"
 #include "base/threading/thread.h"
 #include "mojo/edk/embedder/embedder.h"
 #include "mojo/edk/embedder/process_delegate.h"
 #include "mojo/message_pump/message_pump_mojo.h"
-#include "mojo/shell/runner/host/command_line_switch.h"
+#include "mojo/shell/native_runner_delegate.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace mojo {
 namespace shell {
 namespace {
 
 void ProcessReadyCallbackAdapater(const base::Closure& callback,
                                   base::ProcessId process_id) {
   callback.Run();
 }
 
 class ProcessDelegate : public edk::ProcessDelegate {
  public:
   ProcessDelegate() {}
   ~ProcessDelegate() override {}
 
  private:
   void OnShutdownComplete() override {}
   DISALLOW_COPY_AND_ASSIGN(ProcessDelegate);
 };
 
+class NativeRunnerDelegateImpl : public NativeRunnerDelegate {
+ public:
+  NativeRunnerDelegateImpl() {}
+  ~NativeRunnerDelegateImpl() override {}
+
+  size_t get_and_clear_adjust_count() {
+    size_t count = 0;
+    std::swap(count, adjust_count_);
+    return count;
+  }
+
+ private:
+  // NativeRunnerDelegate:
+  void AdjustCommandLineArgumentsForTarget(
+      const Identity& target,
+      base::CommandLine* command_line) override {
+    adjust_count_++;
+  }
+
+  size_t adjust_count_ = 0;
+
+  DISALLOW_COPY_AND_ASSIGN(NativeRunnerDelegateImpl);
+};
+
 #if defined(OS_ANDROID)
 // TODO(qsr): Multiprocess shell tests are not supported on android.
 #define MAYBE_StartJoin DISABLED_StartJoin
 #else
 #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) {
   base::FilePath shell_dir;
   PathService::Get(base::DIR_MODULE, &shell_dir);
   base::MessageLoop message_loop(
       scoped_ptr<base::MessagePump>(new common::MessagePumpMojo()));
   scoped_refptr<base::SequencedWorkerPool> blocking_pool(
       new base::SequencedWorkerPool(3, "blocking_pool"));
 
   base::Thread io_thread("io_thread");
   base::Thread::Options options;
   options.message_loop_type = base::MessageLoop::TYPE_IO;
   io_thread.StartWithOptions(options);
 
   ProcessDelegate delegate;
   edk::InitIPCSupport(&delegate, io_thread.task_runner());
 
-  ChildProcessHost child_process_host(blocking_pool.get(), false,
-                                      base::FilePath(),
-                                      std::vector<CommandLineSwitch>());
+  NativeRunnerDelegateImpl native_runner_delegate;
+  ChildProcessHost child_process_host(blocking_pool.get(),
+                                      &native_runner_delegate, false,
+                                      Identity(), base::FilePath());
   base::RunLoop run_loop;
   child_process_host.Start(
       base::Bind(&ProcessReadyCallbackAdapater, run_loop.QuitClosure()));
   run_loop.Run();
 
   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);
   blocking_pool->Shutdown();
   edk::ShutdownIPCSupport();
+  EXPECT_EQ(1u, native_runner_delegate.get_and_clear_adjust_count());
 }
 
 }  // namespace
 }  // namespace shell
 }  // namespace mojo