Re-fix http://crbug.com/87176, and add a test.

content/browser/renderer_host/render_process_host_impl_unittest.cc

+// 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 "content/browser/renderer_host/render_process_host_impl.h"
+
+#include "base/command_line.h"
+#include "base/process_util.h"
+#include "base/run_loop.h"
+#include "content/browser/child_process_launcher.h"
+#include "content/browser/loader/resource_dispatcher_host_impl.h"
+#include "content/browser/site_instance_impl.h"
+#include "content/browser/storage_partition_impl.h"
+#include "content/browser/webui/web_ui_controller_factory_registry.h"
+#include "content/common/child_process_messages.h"
+#include "content/common/view_messages.h"
+#include "content/public/browser/render_process_host_factory.h"
+#include "content/public/common/sandboxed_process_launcher_delegate.h"
+#include "content/public/test/test_browser_context.h"
+#include "content/public/test/test_browser_thread.h"
+#include "content/test/test_content_browser_client.h"
+#include "content/test/test_render_view_host_factory.h"
+#include "content/test/test_web_contents.h"
+#include "ipc/ipc_switches.h"
+#include "ipc/ipc_test_sink.h"
+#include "net/url_request/url_request_test_util.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace content {
+namespace {
+
+class FakeChildProcessLauncher;
+
+struct LaunchedChildProcess {
+  // Becomes NULL after the FakeChildProcessLauncher is destroyed.
+  FakeChildProcessLauncher* launcher_;
+  // Collects messages sent to the child process.
+  IPC::TestSink messages_;
+};
+
+class FakeChildProcessLauncher : public ChildProcessLauncher {
+ public:
+  FakeChildProcessLauncher(LaunchedChildProcess* info,
+                           const IPC::ChannelHandle& channel,
+                           Client* client)
+      : info_(info),
+        client_(client),
+        starting_(true),
+        termination_status_(base::TERMINATION_STATUS_NORMAL_TERMINATION),
+        channel_(new IPC::ChannelProxy(
+            channel,
+            IPC::Channel::MODE_CLIENT,
+            &info->messages_,
+            BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO))),
+        weak_this_factory_(this) {
+    info_->launcher_ = this;
+
+    // Automatically start the child process so the RenderProcessHostImpl sends
+    // messages to it.  To mimic real child processes, don't start instantly.
+    base::MessageLoopProxy::current()->PostTask(
+        FROM_HERE,
+        base::Bind(&FakeChildProcessLauncher::Start,
+                   weak_this_factory_.GetWeakPtr()));
+  }
+
+  virtual ~FakeChildProcessLauncher() { info_->launcher_ = NULL; }
+
+  void Send(IPC::Message* msg) {
+    EXPECT_TRUE(channel_->Send(msg));
+  }
+
+  Client* client() const { return client_; }
+
+  // Implementation of ChildProcessLauncher.
+  virtual bool IsStarting() OVERRIDE { return starting_; }
+  virtual base::ProcessHandle GetHandle() OVERRIDE {
+    return base::Process::Current().handle();
+  }
+  virtual base::TerminationStatus GetChildTerminationStatus(bool known_dead,
+                                                            int* exit_code)
+      OVERRIDE {
+    return termination_status_;
+  }
+  virtual void SetProcessBackgrounded(bool background) OVERRIDE {}
+  virtual void SetTerminateChildOnShutdown(bool terminate_on_shutdown)
+      OVERRIDE {}
+
+ private:
+  void Start() {
+    starting_ = false;
+    client_->OnProcessLaunched();
+  }
+
+  LaunchedChildProcess* info_;
+  Client* client_;
+  bool starting_;
+  base::TerminationStatus termination_status_;
+  scoped_ptr<IPC::ChannelProxy> channel_;
+  base::WeakPtrFactory<FakeChildProcessLauncher> weak_this_factory_;
+};
+
+scoped_ptr<ChildProcessLauncher> NewFakeChildProcessLauncher(
+    ScopedVector<LaunchedChildProcess>* child_processes,
+#if defined(OS_WIN)
+    SandboxedProcessLauncherDelegate* delegate,
+#elif defined(OS_POSIX)
+    bool use_zygote,
+    const base::EnvironmentVector& environ,
+    int ipcfd,
+#endif
+    CommandLine* cmd_line,
+    int child_process_id,
+    ChildProcessLauncher::Client* client) {
+#if defined(OS_WIN)
+  delete delegate;
+#endif
+  scoped_ptr<CommandLine> cmd_line_deleter(cmd_line);
+  child_processes->push_back(new LaunchedChildProcess());
+  std::string channel_id =
+      cmd_line->GetSwitchValueASCII(switches::kProcessChannelID);
+  return scoped_ptr<ChildProcessLauncher>(new FakeChildProcessLauncher(
+      child_processes->back(),
+      IPC::ChannelHandle(channel_id
+#if defined(OS_POSIX)
+                         ,
+                         base::FileDescriptor(ipcfd, false)
+#endif
+                         ),
+      client));
+}
+
+class RPHIBrowserContext : public TestBrowserContext {
+ private:
+  virtual net::URLRequestContextGetter* GetRequestContextForRenderProcess(
+      int renderer_child_id) OVERRIDE {
+    return GetRequestContext();
+  }
+};
+
+class RPHIBrowserClient : public TestContentBrowserClient {
+ public:
+  RPHIBrowserClient()
+      : request_context_getter_(new net::TestURLRequestContextGetter(
+            BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO))) {}
+
+  virtual net::URLRequestContextGetter* CreateRequestContext(
+      BrowserContext* browser_context,
+      ProtocolHandlerMap* protocol_handlers) OVERRIDE {
+    return request_context_getter_.get();
+  }
+
+ private:
+  scoped_refptr<net::TestURLRequestContextGetter> request_context_getter_;
+};
+
+class FakeChildProcessRPHFactory : public RenderProcessHostFactory {
+ public:
+  FakeChildProcessRPHFactory(
+      ScopedVector<LaunchedChildProcess>* child_processes)
+      : child_processes_(child_processes) {
+    SiteInstanceImpl::set_render_process_host_factory(this);
+  }
+  virtual ~FakeChildProcessRPHFactory() {
+    SiteInstanceImpl::set_render_process_host_factory(NULL);
+  }
+
+  virtual RenderProcessHost* CreateRenderProcessHost(
+      BrowserContext* browser_context,
+      SiteInstance* site_instance) const OVERRIDE {
+    RenderProcessHostImpl* host =
+        new RenderProcessHostImpl(browser_context,
+                                  static_cast<StoragePartitionImpl*>(
+                                      TestBrowserContext::GetStoragePartition(
+                                          browser_context, site_instance)),
+                                  false,
+                                  false);
+    host->SetChildProcessLauncherFactory(
+        base::Bind(&NewFakeChildProcessLauncher, child_processes_));
+    return host;
+  }
+
+ private:
+  ScopedVector<LaunchedChildProcess>* child_processes_;
+};
+
+class RenderProcessHostImplTest : public testing::Test {
+ public:
+  RenderProcessHostImplTest()
+      : ui_thread_(BrowserThread::UI, &message_loop_),
+        webkit_thread_(BrowserThread::WEBKIT_DEPRECATED, &message_loop_),
+        file_user_blocking_thread_(BrowserThread::FILE_USER_BLOCKING,
+                                   &message_loop_),
+        io_thread_(BrowserThread::IO, &message_loop_),
+        old_browser_client_(SetBrowserClientForTesting(&test_browser_client_)) {
+  }
+
+  virtual ~RenderProcessHostImplTest() {
+    base::RunLoop().RunUntilIdle();
+    SetBrowserClientForTesting(old_browser_client_);
+  }
+
+ protected:
+  ScopedVector<LaunchedChildProcess> child_processes_;
+  base::MessageLoopForIO message_loop_;
+  TestBrowserThread ui_thread_;
+  TestBrowserThread webkit_thread_;
+  TestBrowserThread file_user_blocking_thread_;
+  TestBrowserThread io_thread_;
+
+  RPHIBrowserContext browser_context_;
+  RPHIBrowserClient test_browser_client_;
+  ContentBrowserClient* old_browser_client_;
+  ResourceDispatcherHostImpl resource_dispatcher_host_;
+
+  DISALLOW_COPY_AND_ASSIGN(RenderProcessHostImplTest);
+};
+
+// http://crbug.com/87176
+TEST_F(RenderProcessHostImplTest,
+       RejectShutdownFromChildProcessWithOneActiveView) {
+  const GURL kUrl("http://example.com");
+
+  scoped_refptr<SiteInstance> site(
+      SiteInstance::CreateForURL(&browser_context_, kUrl));
+  FakeChildProcessRPHFactory rph_factory(&child_processes_);
+
+  WebContents::CreateParams params(&browser_context_, site.get());
+  scoped_ptr<WebContentsImpl> tab(
+      WebContentsImpl::CreateWithOpener(params, NULL));
+  tab->GetController().LoadURL(kUrl, Referrer(), PAGE_TRANSITION_TYPED, "");
+  base::RunLoop().RunUntilIdle();
+  ASSERT_EQ(1U, child_processes_.size());
+
+  child_processes_[0]->messages_.ClearMessages();
+
+  RenderProcessHostImpl* tab_process =
+      static_cast<RenderProcessHostImpl*>(tab->GetSiteInstance()->GetProcess());
+  EXPECT_EQ(1, tab_process->GetActiveViewCount());
+  EXPECT_EQ(child_processes_[0]->launcher_->client(), tab_process);
+
+  // Sometimes the renderer process's ShutdownRequest (corresponding to the
+  // ViewMsg_WasSwappedOut from a previous navigation) doesn't arrive until
+  // after the browser process decides to re-use the renderer for a new purpose.
+  // This test makes sure the browser doesn't let the renderer die in that case.
+  child_processes_[0]->launcher_->
+      Send(new ChildProcessHostMsg_ShutdownRequest());
+  base::RunLoop().RunUntilIdle();
+  EXPECT_FALSE(child_processes_[0]->messages_.GetFirstMessageMatching(
+      ChildProcessMsg_Shutdown::ID))
+      << "Host sent a message confirming that the renderer process should shut "
+      << "down even though it was still being used.";
+}
+
+}  // namespace
+}  // namespace content