Future proof against things like http://crbug.com/91521

remoting/client/client_context.cc

Index: remoting/client/client_context.cc
diff --git a/remoting/client/client_context.cc b/remoting/client/client_context.cc
index 5f6d1399ae755264331167542b55c85108dda31b..f77bed3c16f64e02e83b1993d48c6207bbb2000b 100644
--- a/remoting/client/client_context.cc
+++ b/remoting/client/client_context.cc
@@ -13,7 +13,8 @@ namespace remoting {
 
 ClientContext::ClientContext()
     : main_thread_("ChromotingClientMainThread"),
-      decode_thread_("ChromotingClientDecodeThread") {
+      decode_thread_("ChromotingClientDecodeThread"),
+      started_(false) {
 }
 
 ClientContext::~ClientContext() {
@@ -24,13 +25,17 @@ void ClientContext::Start() {
   main_thread_.Start();
   decode_thread_.Start();
   jingle_thread_.Start();
+  started_ = true;
 }
 
 void ClientContext::Stop() {
-  // Stop all the threads.
-  jingle_thread_.Stop();
-  decode_thread_.Stop();
-  main_thread_.Stop();
+  if (started_) {
+    // Stop all the threads.
+    jingle_thread_.Stop();
+    decode_thread_.Stop();
+    main_thread_.Stop();
+    started_ = false;
+  }
 }
 
 JingleThread* ClientContext::jingle_thread() {