Fix posix IPC channel hanging problem.

ipc/ipc_channel_posix.cc

Index: ipc/ipc_channel_posix.cc
diff --git a/ipc/ipc_channel_posix.cc b/ipc/ipc_channel_posix.cc
index 878853290016620a1276ce2707ed52b8a7fa7f9b..e539d4f929caa746709b81b996c2e5e99bae71d2 100644
--- a/ipc/ipc_channel_posix.cc
+++ b/ipc/ipc_channel_posix.cc
@@ -31,6 +31,7 @@
 #include "base/posix/global_descriptors.h"
 #include "base/process/process_handle.h"
 #include "base/rand_util.h"
+#include "base/run_loop.h"
 #include "base/stl_util.h"
 #include "base/strings/string_util.h"
 #include "base/synchronization/lock.h"
@@ -327,7 +328,7 @@ bool Channel::ChannelImpl::CreatePipe(
 
 bool Channel::ChannelImpl::Connect() {
   if (server_listen_pipe_ == -1 && pipe_ == -1) {
-    DLOG(INFO) << "Channel creation failed: " << pipe_name_;
+    DLOG(WARNING) << "Channel creation failed: " << pipe_name_;
     return false;
   }
 
@@ -515,6 +516,9 @@ bool Channel::ChannelImpl::Send(Message* message) {
            << " with type " << message->type()
            << " (" << output_queue_.size() << " in queue)";
 
+  if (!waiting_connect_ && pipe_ == -1)
+    return false;
+
 #ifdef IPC_MESSAGE_LOG_ENABLED
   Logging::GetInstance()->OnSendMessage(message, "");
 #endif  // IPC_MESSAGE_LOG_ENABLED
@@ -522,7 +526,10 @@ bool Channel::ChannelImpl::Send(Message* message) {
   message->TraceMessageBegin();
   output_queue_.push(message);
   if (!is_blocked_on_write_ && !waiting_connect_) {
-    return ProcessOutgoingMessages();
+    if (!ProcessOutgoingMessages()) {
+      ClosePipeOnError();
+      return false;
+    }
   }
 
   return true;
@@ -707,7 +714,11 @@ bool Channel::ChannelImpl::AcceptConnection() {
     // In server mode we will send a hello message when we receive one from a
     // client.
     waiting_connect_ = false;
-    return ProcessOutgoingMessages();
+    if (!ProcessOutgoingMessages()) {
+      ClosePipeOnError();
+      return false;
+    }
+    return true;
   } else if (mode_ & MODE_SERVER_FLAG) {
     waiting_connect_ = true;
     return true;