Pepper: Move NaCl fatal logging to Chrome IPC.

components/nacl/loader/nacl_trusted_listener.h

Index: components/nacl/loader/nacl_trusted_listener.h
diff --git a/components/nacl/loader/nacl_trusted_listener.h b/components/nacl/loader/nacl_trusted_listener.h
index 4819e05f5934562f36c716bf010d6e6ca08313e1..8e95ebdfc6d02a616f632984e2a21c3ebed9eedd 100644
--- a/components/nacl/loader/nacl_trusted_listener.h
+++ b/components/nacl/loader/nacl_trusted_listener.h
@@ -6,6 +6,7 @@
 #define COMPONENTS_NACL_LOADER_NACL_TRUSTED_LISTENER_H_
 
 #include "base/memory/ref_counted.h"
+#include "base/synchronization/waitable_event.h"
 #include "ipc/ipc_channel_handle.h"
 #include "ipc/ipc_channel_proxy.h"
 #include "ipc/ipc_listener.h"
@@ -30,10 +31,21 @@ class NaClTrustedListener : public base::RefCounted<NaClTrustedListener>,
 
   bool Send(IPC::Message* msg);
 
+  // Sends a fatal log message to the renderer. This has a different Send
+  // method since it makes an attempt at flushing before shutdown.
+  bool SendFatalCrashLog(const std::string& log);
+
+  static NaClTrustedListener* Get();
+
  private:
   friend class base::RefCounted<NaClTrustedListener>;
   virtual ~NaClTrustedListener();
+  void SignalIpcTaskRunnerFlushed();
+
+  base::SingleThreadTaskRunner* ipc_task_runner_;
   scoped_ptr<IPC::ChannelProxy> channel_proxy_;
+  base::WaitableEvent waitable_event_;
+  bool send_fatal_crash_log_called_;
 
   DISALLOW_COPY_AND_ASSIGN(NaClTrustedListener);
 };