Collect tab timing information for use in telementry-based startup tests

content/renderer/dom_automation_controller.cc

Index: content/renderer/dom_automation_controller.cc
diff --git a/content/renderer/dom_automation_controller.cc b/content/renderer/dom_automation_controller.cc
index 1718d646026c2a16369d1007b64a448508dacf4e..9c051e05d450e8eb973bcc15d9c536940e796128 100644
--- a/content/renderer/dom_automation_controller.cc
+++ b/content/renderer/dom_automation_controller.cc
@@ -37,6 +37,9 @@ DomAutomationController::DomAutomationController()
   BindCallback("getBrowserHistogram",
                base::Bind(&DomAutomationController::GetBrowserHistogram,
                           base::Unretained(this)));
+  BindCallback("getTabLoadTimingInformation",
+               base::Bind(&DomAutomationController::GetTabLoadTimingInformation,
+                          base::Unretained(this)));
 }
 
 void DomAutomationController::Send(const CppArgumentList& args,
@@ -213,4 +216,19 @@ void DomAutomationController::GetBrowserHistogram(const CppArgumentList& args,
   result->Set(histogram_json);
 }
 
+void DomAutomationController::GetTabLoadTimingInformation(
+                                  const CppArgumentList& args,
+                                  CppVariant* result) {
+  if (!sender_) {
+    NOTREACHED();
+    result->SetNull();
+    return;
+  }
+
+  std::string tab_timing_json;
+  sender_->Send(
+      new ChildProcessHostMsg_GetTabLoadTimingInformation(&tab_timing_json));
+  result->Set(tab_timing_json);
+}
+
 }  // namespace content