Fix "unreachable code" warnings (MSVC warning 4702) in content/.

content/child/child_thread.cc

 // 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/child/child_thread.h"
 
 #include <signal.h>
 
 #include <string>
 
@@ skipping 469 matching lines @@
 }
 
 void ChildThread::OnDumpHandles() {
 #if defined(OS_WIN)
   scoped_refptr<HandleEnumerator> handle_enum(
       new HandleEnumerator(
           CommandLine::ForCurrentProcess()->HasSwitch(
               switches::kAuditAllHandles)));
   handle_enum->EnumerateHandles();
   Send(new ChildProcessHostMsg_DumpHandlesDone);
-  return;
+#else
+  NOTIMPLEMENTED();
 #endif
-
-  NOTIMPLEMENTED();
 }
 
 #if defined(USE_TCMALLOC)
 void ChildThread::OnGetTcmallocStats() {
   std::string result;
   char buffer[1024 * 32];
   base::allocator::GetStats(buffer, sizeof(buffer));
   result.append(buffer);
   Send(new ChildProcessHostMsg_TcmallocStats(result));
 }
@@ skipping 11 matching lines @@
       "this method should NOT be called from child thread itself";
   {
     base::AutoLock lock(g_lazy_child_thread_lock.Get());
     while (!g_child_thread)
       g_lazy_child_thread_cv.Get().Wait();
   }
   DCHECK_NE(base::MessageLoop::current(), g_child_thread->message_loop());
   g_child_thread->message_loop()->PostTask(
       FROM_HERE, base::Bind(&QuitMainThreadMessageLoop));
 }
-
 #endif
 
 void ChildThread::OnProcessFinalRelease() {
   if (on_channel_error_called_) {
     base::MessageLoop::current()->Quit();
     return;
   }
 
   // The child process shutdown sequence is a request response based mechanism,
   // where we send out an initial feeler request to the child process host
   // instance in the browser to verify if it's ok to shutdown the child process.
   // The browser then sends back a response if it's ok to shutdown. This avoids
   // race conditions if the process refcount is 0 but there's an IPC message
   // inflight that would addref it.
   Send(new ChildProcessHostMsg_ShutdownRequest);
 }
 
 void ChildThread::EnsureConnected() {
   VLOG(0) << "ChildThread::EnsureConnected()";
   base::KillProcess(base::GetCurrentProcessHandle(), 0, false);
 }
 
 }  // namespace content