Get content_browsertest working. I've added a simple test for now, and will convert the tests in sr…

content/test/browser_test_utils.cc

Index: content/test/browser_test_utils.cc
===================================================================
--- content/test/browser_test_utils.cc	(revision 0)
+++ content/test/browser_test_utils.cc	(revision 0)
@@ -0,0 +1,59 @@
+// Copyright (c) 2012 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 "content/public/test/browser_test_utils.h"
+
+#include "base/bind.h"
+#include "base/message_loop.h"
+#include "base/run_loop.h"
+#include "content/public/test/test_launcher.h"
+
+namespace {
+
+// Number of times to repost a Quit task so that the MessageLoop finishes up
+// pending tasks and tasks posted by those pending tasks without risking the
+// potential hang behavior of MessageLoop::QuitWhenIdle.
+// The criteria for choosing this number: it should be high enough to make the
+// quit act like QuitWhenIdle, while taking into account that any page which is
+// animating may be rendering another frame for each quit deferral. For an
+// animating page, the potential delay to quitting the RunLoop would be
+// kNumQuitDeferrals * frame_render_time. Some perf tests run slow, such as
+// 200ms/frame.
+static const int kNumQuitDeferrals = 10;
+
+static void DeferredQuitRunLoop(const base::Closure& quit_task,
+                                int num_quit_deferrals) {
+  if (num_quit_deferrals <= 0) {
+    quit_task.Run();
+  } else {
+    MessageLoop::current()->PostTask(FROM_HERE,
+        base::Bind(&DeferredQuitRunLoop, quit_task, num_quit_deferrals - 1));
+  }
+}
+
+}
+
+namespace content {
+
+void RunThisRunLoop(base::RunLoop* run_loop) {
+  MessageLoop::ScopedNestableTaskAllower allow(MessageLoop::current());
+
+  test_launcher::TestLauncherDelegate* delegate =
+      test_launcher::GetCurrentTestLauncherDelegate();
+  // TODO(jam): the null check shouldn't be needed, since this code should only
+  // be called from browser_tests. Unfortunately some unittests are calling this
+  // code.
+  if (delegate)
+    delegate->PreRunMessageLoop(run_loop);
+  run_loop->Run();
+  if (delegate)
+    delegate->PostRunMessageLoop();
+}
+
+base::Closure GetQuitTaskForRunLoop(base::RunLoop* run_loop) {
+  return base::Bind(&DeferredQuitRunLoop, run_loop->QuitClosure(),
+                    kNumQuitDeferrals);
+}
+
+}  // namespace content