(DEPRECATED) Send navigation_start to browser process in DidStartProvisionalLoad

content/common/navigation_params.h

Index: content/common/navigation_params.h
diff --git a/content/common/navigation_params.h b/content/common/navigation_params.h
index cf3d89a2cbb2fb9473b23918cecb02e030a3d161..40dbc58f2f0b3c76b0e6ea8f6efb9f33465ce5cf 100644
--- a/content/common/navigation_params.h
+++ b/content/common/navigation_params.h
@@ -127,7 +127,8 @@ struct CONTENT_EXPORT BeginNavigationParams {
                         int load_flags,
                         bool has_user_gesture,
                         bool skip_service_worker,
-                        RequestContextType request_context_type);
+                        RequestContextType request_context_type,
+                        double renderer_navigation_start);

[clamy, 2015/10/28 12:40:01]

Instead of adding a new value in BeginNavigationParams, I suggest we move
browser_navigation_start out of the RequestNavigationParams into the
CommonNavigationParams and rename it navigation_start.

Whether in PlzNavigate or in browser-initiated navigations in the current
architecture, we always initialize a CommonNavigationParams at the beginning of
the navigation. For renderer-initiated navigations in the current architecture,
it's initialized when we create the provisional DataSource for the frame, which
(I think) corresponds to the start of the navigation.

 
   // The request method: GET, POST, etc.
   std::string method;
@@ -146,6 +147,9 @@ struct CONTENT_EXPORT BeginNavigationParams {
 
   // Indicates the request context type.
   RequestContextType request_context_type;
+
+  // The time the navigation started in the renderer.
+  double renderer_navigation_start;
 };
 
 // Provided by the browser -----------------------------------------------------