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

content/shell/browser/shell.h

Index: content/shell/browser/shell.h
diff --git a/content/shell/browser/shell.h b/content/shell/browser/shell.h
index c9f9c9f9e81b4e1bdedae4a94a4b537bd220f7ac..bb8db4ff4677e28067428b49d4f0542f1dc878cf 100644
--- a/content/shell/browser/shell.h
+++ b/content/shell/browser/shell.h
@@ -70,8 +70,6 @@ class Shell : public WebContentsDelegate,
   void Close();
   void ShowDevTools();
   void ShowDevToolsForElementAt(int x, int y);
-  void ShowDevToolsForTest(const std::string& settings,
-                           const std::string& frontend_url);
   void CloseDevTools();
 #if defined(OS_MACOSX)
   // Resizes the web content view to the given dimensions.
@@ -216,8 +214,7 @@ class Shell : public WebContentsDelegate,
   // WebContentsObserver
   void TitleWasSet(NavigationEntry* entry, bool explicit_set) override;
 
-  void InnerShowDevTools(const std::string& settings,
-                         const std::string& frontend_url);
+  void InnerShowDevTools();
   void OnDevToolsWebContentsDestroyed();
 
   scoped_ptr<ShellJavaScriptDialogManager> dialog_manager_;