Expose GlobalRequestID in NavigationHandle and ResourceRequestInfo.

content/public/browser/navigation_handle.h

Index: content/public/browser/navigation_handle.h
diff --git a/content/public/browser/navigation_handle.h b/content/public/browser/navigation_handle.h
index f2506c82dce30a5df29d0599180cd8268f09ae2a..2ed412b6167491c6bf6cbc49194088ea52c37645 100644
--- a/content/public/browser/navigation_handle.h
+++ b/content/public/browser/navigation_handle.h
@@ -6,6 +6,7 @@
 #define CONTENT_PUBLIC_BROWSER_NAVIGATION_HANDLE_H_
 
 #include <memory>
+#include <string>
 
 #include "content/common/content_export.h"
 #include "content/public/browser/navigation_throttle.h"
@@ -21,6 +22,7 @@ class HttpResponseHeaders;
 }  // namespace net
 
 namespace content {
+struct GlobalRequestID;
 class NavigationData;
 class NavigationThrottle;
 class RenderFrameHost;
@@ -188,6 +190,14 @@ class CONTENT_EXPORT NavigationHandle {
   virtual void CancelDeferredNavigation(
       NavigationThrottle::ThrottleCheckResult result) = 0;
 
+  // Returns the ID of the URLRequest associated with this navigation. Can only
+  // be called from NavigationThrottle::WillProcessResponse and
+  // WebContentsObserver::ReadyToCommitNavigation.
+  // In the case of transfer navigations, this is the ID of the first request
+  // made. The transferred request's ID will not be tracked by the
+  // NavigationHandle.
+  virtual const GlobalRequestID& GetGlobalRequestID() = 0;
+
   // Testing methods ----------------------------------------------------------
   //
   // The following methods should be used exclusively for writing unit tests.