Ignore kill termination status when shutting down a child process.

content/common/child_process_host_impl.cc

Index: content/common/child_process_host_impl.cc
diff --git a/content/common/child_process_host_impl.cc b/content/common/child_process_host_impl.cc
index 909a3d6ee256f974a39ac1416e44acd43c121698..b7b6c0a775a75ba3b88dfd717fb9c3767a2d99b7 100644
--- a/content/common/child_process_host_impl.cc
+++ b/content/common/child_process_host_impl.cc
@@ -85,7 +85,8 @@ base::FilePath ChildProcessHost::GetChildPath(int flags) {
 
 ChildProcessHostImpl::ChildProcessHostImpl(ChildProcessHostDelegate* delegate)
     : delegate_(delegate),
-      opening_channel_(false) {
+      opening_channel_(false),
+      is_shutting_down_(false) {
 #if defined(OS_WIN)
   AddFilter(new FontCacheDispatcher());
 #endif
@@ -130,6 +131,11 @@ void ChildProcessHostImpl::AddFilter(IPC::MessageFilter* filter) {
 
 void ChildProcessHostImpl::ForceShutdown() {
   Send(new ChildProcessMsg_Shutdown());
+  is_shutting_down_ = true;
+}
+
+bool ChildProcessHostImpl::IsShuttingDown() {
+  return is_shutting_down_;
 }
 
 std::string ChildProcessHostImpl::CreateChannelMojo(
@@ -330,8 +336,10 @@ void ChildProcessHostImpl::OnAllocateSharedMemory(
 }
 
 void ChildProcessHostImpl::OnShutdownRequest() {
-  if (delegate_->CanShutdown())
+  if (delegate_->CanShutdown()) {
     Send(new ChildProcessMsg_Shutdown());
+    is_shutting_down_ = true;
+  }
 }
 
 void ChildProcessHostImpl::OnAllocateGpuMemoryBuffer(