Switch to TimeDelta interfaces in chrome automation test infrastructure.

chrome/test/automation/proxy_launcher.h

Index: chrome/test/automation/proxy_launcher.h
diff --git a/chrome/test/automation/proxy_launcher.h b/chrome/test/automation/proxy_launcher.h
index d6886e1801720c7078a0731973bd3c96ee2e6cf9..a9924598ad32026ffea38e41d6dbbccb1e1180f0 100644
--- a/chrome/test/automation/proxy_launcher.h
+++ b/chrome/test/automation/proxy_launcher.h
@@ -105,7 +105,7 @@ class ProxyLauncher {
   // Wait for the browser process to shut down on its own (i.e. as a result of
   // some action that your test has taken). If it has exited within |timeout|,
   // puts the exit code in |exit_code| and returns true.
-  bool WaitForBrowserProcessToQuit(int timeout, int* exit_code);
+  bool WaitForBrowserProcessToQuit(base::TimeDelta timeout, int* exit_code);
 
   AutomationProxy* automation() const;
 
@@ -134,7 +134,7 @@ class ProxyLauncher {
  protected:
   // Creates an automation proxy.
   virtual AutomationProxy* CreateAutomationProxy(
-      int execution_timeout) = 0;
+      base::TimeDelta execution_timeout) = 0;
 
   // Returns the automation proxy's channel with any prefixes prepended,
   // for passing as a command line parameter over to the browser.
@@ -218,7 +218,8 @@ class NamedProxyLauncher : public ProxyLauncher {
   NamedProxyLauncher(const std::string& channel_id,
                      bool launch_browser, bool disconnect_on_failure);
 
-  virtual AutomationProxy* CreateAutomationProxy(int execution_timeout);
+  virtual AutomationProxy* CreateAutomationProxy(
+      base::TimeDelta execution_timeout);
   virtual bool InitializeConnection(
       const LaunchState& state,
       bool wait_for_initial_loads) OVERRIDE WARN_UNUSED_RESULT;
@@ -238,7 +239,8 @@ class NamedProxyLauncher : public ProxyLauncher {
 class AnonymousProxyLauncher : public ProxyLauncher {
  public:
   explicit AnonymousProxyLauncher(bool disconnect_on_failure);
-  virtual AutomationProxy* CreateAutomationProxy(int execution_timeout);
+  virtual AutomationProxy* CreateAutomationProxy(
+      base::TimeDelta execution_timeout);
   virtual bool InitializeConnection(
       const LaunchState& state,
       bool wait_for_initial_loads) OVERRIDE WARN_UNUSED_RESULT;