Added code for renderer to cleanly exit.

content/renderer/renderer_main.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 "base/base_switches.h"
 #include "base/command_line.h"
 #include "base/debug/debugger.h"
 #include "base/debug/trace_event.h"
 #include "base/i18n/rtl.h"
 #include "base/memory/ref_counted.h"
@@ skipping 108 matching lines @@
     if (!begin_process_message_.is_null())
       process_times_->AddTime(base::TimeTicks::Now() - begin_process_message_);
   }
 
  private:
   base::TimeTicks begin_process_message_;
   base::Histogram* const process_times_;
   DISALLOW_COPY_AND_ASSIGN(RendererMessageLoopObserver);
 };
 
+#if defined(RENDERER_CLEAN_EXIT)
+static void SigtermHandler(int signal_number)
+{
+  base::clean_exit(signal_number);
+}
+
+static void AddSigtermHandler()
+{
+  struct sigaction term_action;
+  int return_value;
+  memset(&term_action, 0, sizeof(term_action));
+  term_action.sa_handler = SigtermHandler;
+  sigfillset(&term_action.sa_mask);
+  return_value = sigaction(SIGTERM, &term_action, NULL);
+  CHECK(return_value==0) << "Unable to install SIGTERM handler\n";
+}
+#endif // defined(RENDERER_CLEAN_EXIT)
+
 // mainline routine for running as the Renderer process
 int RendererMain(const content::MainFunctionParams& parameters) {
   TRACE_EVENT_BEGIN_ETW("RendererMain", 0, "");
 
   const CommandLine& parsed_command_line = parameters.command_line;
 
 #if defined(OS_MACOSX)
   base::mac::ScopedNSAutoreleasePool* pool = parameters.autorelease_pool;
   InstallFrameworkHacks();
 #endif  // OS_MACOSX
@@ skipping 86 matching lines @@
     }
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
     RenderProcessImpl render_process;
     new RenderThreadImpl();
 #endif
 
     platform.RunSandboxTests();
 
     startup_timer.Stop();  // End of Startup Time Measurement.
 
+#if defined(RENDERER_CLEAN_EXIT)
+    AddSigtermHandler();
+#endif
+
     if (run_loop) {
 #if defined(OS_MACOSX)
       if (pool)
         pool->Recycle();
 #endif
       TRACE_EVENT_BEGIN_ETW("RendererMain.START_MSG_LOOP", 0, 0);
       MessageLoop::current()->Run();
       TRACE_EVENT_END_ETW("RendererMain.START_MSG_LOOP", 0, 0);
     }
   }
   platform.PlatformUninitialize();
   TRACE_EVENT_END_ETW("RendererMain", 0, "");
   return 0;
 }