Separate mojo/shell into a runner and the application manager (shell)

mojo/shell/desktop/launcher_process.cc

Index: mojo/shell/desktop/launcher_process.cc
diff --git a/mojo/shell/desktop/launcher_process.cc b/mojo/shell/desktop/launcher_process.cc
deleted file mode 100644
index 1b47cc815d50d203a06af5677eee363ac48743d3..0000000000000000000000000000000000000000
--- a/mojo/shell/desktop/launcher_process.cc
+++ /dev/null
@@ -1,136 +0,0 @@
-// 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.
-
-#include <stdio.h>
-#include <string.h>
-
-#include <algorithm>
-#include <iostream>
-
-#include "base/base_switches.h"
-#include "base/bind.h"
-#include "base/command_line.h"
-#include "base/files/file_util.h"
-#include "base/message_loop/message_loop.h"
-#include "base/synchronization/waitable_event.h"
-#include "base/trace_event/trace_event.h"
-#include "mojo/shell/context.h"
-#include "mojo/shell/switches.h"
-
-namespace mojo {
-namespace shell {
-namespace {
-
-// Whether we're currently tracing.
-bool g_tracing = false;
-
-// Number of tracing blocks written.
-uint32_t g_blocks = 0;
-
-// Trace file, if open.
-FILE* g_trace_file = nullptr;
-
-void WriteTraceDataCollected(
-    base::WaitableEvent* event,
-    const scoped_refptr<base::RefCountedString>& events_str,
-    bool has_more_events) {
-  if (g_blocks) {
-    fwrite(",", 1, 1, g_trace_file);
-  }
-
-  ++g_blocks;
-  fwrite(events_str->data().c_str(), 1, events_str->data().length(),
-         g_trace_file);
-  if (!has_more_events) {
-    static const char kEnd[] = "]}";
-    fwrite(kEnd, 1, strlen(kEnd), g_trace_file);
-    PCHECK(fclose(g_trace_file) == 0);
-    g_trace_file = nullptr;
-    event->Signal();
-  }
-}
-
-void EndTraceAndFlush(base::WaitableEvent* event) {
-  g_trace_file = fopen("mojo_shell.trace", "w+");
-  PCHECK(g_trace_file);
-  static const char kStart[] = "{\"traceEvents\":[";
-  fwrite(kStart, 1, strlen(kStart), g_trace_file);
-  base::trace_event::TraceLog::GetInstance()->SetDisabled();
-  base::trace_event::TraceLog::GetInstance()->Flush(
-      base::Bind(&WriteTraceDataCollected, base::Unretained(event)));
-}
-
-void StopTracingAndFlushToDisk() {
-  g_tracing = false;
-  base::trace_event::TraceLog::GetInstance()->SetDisabled();
-  base::WaitableEvent flush_complete_event(false, false);
-  // TraceLog::Flush requires a message loop but we've already shut ours down.
-  // Spin up a new thread to flush things out.
-  base::Thread flush_thread("mojo_shell_trace_event_flush");
-  flush_thread.Start();
-  flush_thread.message_loop()->PostTask(
-      FROM_HERE,
-      base::Bind(EndTraceAndFlush, base::Unretained(&flush_complete_event)));
-  flush_complete_event.Wait();
-}
-
-void StartApp(mojo::shell::Context* context) {
-  // If a mojo app isn't specified (i.e. for an apptest), run the mojo shell's
-  // window manager.
-  GURL app_url(GURL("mojo:window_manager"));
-  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
-  base::CommandLine::StringVector args = command_line->GetArgs();
-  for (size_t i = 0; i < args.size(); ++i) {
-    GURL possible_app(args[i]);
-    if (possible_app.SchemeIs("mojo")) {
-      app_url = possible_app;
-      break;
-    }
-  }
-
-  context->Run(app_url);
-}
-
-}  // namespace
-
-int LauncherProcessMain(int argc, char** argv) {
-  const base::CommandLine& command_line =
-      *base::CommandLine::ForCurrentProcess();
-  if (command_line.HasSwitch(switches::kTraceStartup)) {
-    g_tracing = true;
-    base::trace_event::CategoryFilter category_filter(
-        command_line.GetSwitchValueASCII(switches::kTraceStartup));
-    base::trace_event::TraceLog::GetInstance()->SetEnabled(
-        category_filter, base::trace_event::TraceLog::RECORDING_MODE,
-        base::trace_event::TraceOptions(base::trace_event::RECORD_UNTIL_FULL));
-  }
-
-  // We want the shell::Context to outlive the MessageLoop so that pipes are
-  // all gracefully closed / error-out before we try to shut the Context down.
-  mojo::shell::Context shell_context;
-  {
-    base::MessageLoop message_loop;
-    if (!shell_context.Init()) {
-      return 0;
-    }
-    if (g_tracing) {
-      message_loop.PostDelayedTask(FROM_HERE,
-                                   base::Bind(StopTracingAndFlushToDisk),
-                                   base::TimeDelta::FromSeconds(5));
-    }
-
-    message_loop.PostTask(FROM_HERE, base::Bind(&StartApp, &shell_context));
-    message_loop.Run();
-
-    // Must be called before |message_loop| is destroyed.
-    shell_context.Shutdown();
-  }
-
-  if (g_tracing)
-    StopTracingAndFlushToDisk();
-  return 0;
-}
-
-}  // namespace shell
-}  // namespace mojo