Send screenshots back to the client for debugging

chrome/test/webdriver/session_manager.h

Index: chrome/test/webdriver/session_manager.h
diff --git a/chrome/test/webdriver/session_manager.h b/chrome/test/webdriver/session_manager.h
index a99d989f33abd9df58fa8dc1e19b2798c8a02757..3e0637af303a34b0ce150fbaa436eff8f11aac71 100644
--- a/chrome/test/webdriver/session_manager.h
+++ b/chrome/test/webdriver/session_manager.h
@@ -33,13 +33,14 @@ class SessionManager {
 
   Session* GetSession(const std::string& id) const;
 
-  void set_port(const std::string& port);
+  void SetPort(const std::string& port);
+  void SetChromeDir(const FilePath& chrome_dir);
+  void SetScreenshotOnError(bool screenshot);
+  void SetUrlBase(const std::string& url_base);
 
-  void set_url_base(const std::string& url_base);
-  std::string url_base() const;
-
-  void set_chrome_dir(const FilePath& chrome_dir);
-  FilePath chrome_dir() const;
+  FilePath ChromeDir() const;
+  std::string UrlBase() const;
+  bool ScreenshotOnError() const;
 
  private:
   SessionManager();
@@ -51,6 +52,7 @@ class SessionManager {
   std::string port_;
   std::string url_base_;
   FilePath chrome_dir_;
+  bool screenshot_on_error_;
 
   DISALLOW_COPY_AND_ASSIGN(SessionManager);
 };