Don't waste time on browser that crashed before connecting to the IPC channel.

chrome/test/automation/proxy_launcher.cc

Index: chrome/test/automation/proxy_launcher.cc
diff --git a/chrome/test/automation/proxy_launcher.cc b/chrome/test/automation/proxy_launcher.cc
index 44c636df06600e54673e39c84e4d60a639337a0b..6667f510e900d7cbffd7a24cb6849578c6e87f55 100644
--- a/chrome/test/automation/proxy_launcher.cc
+++ b/chrome/test/automation/proxy_launcher.cc
@@ -218,7 +218,7 @@ bool ProxyLauncher::LaunchAnotherBrowserBlockUntilClosed(
 void ProxyLauncher::QuitBrowser() {
   // If we have already finished waiting for the browser to exit
   // (or it hasn't launched at all), there's nothing to do here.
-  if (process_ == base::kNullProcessHandle)
+  if (process_ == base::kNullProcessHandle || !automation_proxy_.get())
     return;
 
   if (SESSION_ENDING == shutdown_type_) {
@@ -288,7 +288,7 @@ void ProxyLauncher::QuitBrowser() {
 void ProxyLauncher::TerminateBrowser() {
   // If we have already finished waiting for the browser to exit
   // (or it hasn't launched at all), there's nothing to do here.
-  if (process_ == base::kNullProcessHandle)
+  if (process_ == base::kNullProcessHandle || !automation_proxy_.get())
     return;
 
   base::TimeTicks quit_start = base::TimeTicks::Now();