Test runner: make inspector tests reuse a single inspector process.

content/shell/browser/webkit_test_controller.cc

Index: content/shell/browser/webkit_test_controller.cc
diff --git a/content/shell/browser/webkit_test_controller.cc b/content/shell/browser/webkit_test_controller.cc
index 3712d32fe4759afd069aac557f05fea6c990e084..6d8430eeaa7b9808036504d2a7c4ce4691a585bc 100644
--- a/content/shell/browser/webkit_test_controller.cc
+++ b/content/shell/browser/webkit_test_controller.cc
@@ -205,7 +205,8 @@ WebKitTestController::WebKitTestController()
       is_leak_detection_enabled_(
           base::CommandLine::ForCurrentProcess()->HasSwitch(
               switches::kEnableLeakDetection)),
-      crash_when_leak_found_(false) {
+      crash_when_leak_found_(false),
+      devtools_frontend_(NULL) {
   CHECK(!instance_);
   instance_ = this;
 
@@ -586,11 +587,19 @@ void WebKitTestController::OnClearDevToolsLocalStorage() {
 
 void WebKitTestController::OnShowDevTools(const std::string& settings,
                                           const std::string& frontend_url) {
-  main_window_->ShowDevToolsForTest(settings, frontend_url);
+  if (!devtools_frontend_) {
+    devtools_frontend_ = LayoutTestDevToolsFrontend::Show(
+        main_window_->web_contents(), settings, frontend_url);
+  } else {
+    devtools_frontend_->SwitchToTarget(main_window_->web_contents());
+  }
+  devtools_frontend_->Activate();
+  devtools_frontend_->Focus();
 }
 
 void WebKitTestController::OnCloseDevTools() {
-  main_window_->CloseDevTools();
+  if (devtools_frontend_)
+    devtools_frontend_->DisconnectFromTarget();
 }
 
 void WebKitTestController::OnGoToOffset(int offset) {
@@ -653,8 +662,10 @@ void WebKitTestController::OnCaptureSessionHistory() {
 void WebKitTestController::OnCloseRemainingWindows() {
   DevToolsAgentHost::DetachAllClients();
   std::vector<Shell*> open_windows(Shell::windows());
+  Shell* devtools_shell = devtools_frontend_ ?
+      devtools_frontend_->frontend_shell() : NULL;
   for (size_t i = 0; i < open_windows.size(); ++i) {
-    if (open_windows[i] != main_window_)
+    if (open_windows[i] != main_window_ && open_windows[i] != devtools_shell)
       open_windows[i]->Close();
   }
   base::MessageLoop::current()->RunUntilIdle();