Revert of Expose GlobalRequestID in NavigationHandle and ResourceRequestInfo.

chrome/browser/data_use_measurement/data_use_web_contents_observer.h

Index: chrome/browser/data_use_measurement/data_use_web_contents_observer.h
diff --git a/chrome/browser/data_use_measurement/data_use_web_contents_observer.h b/chrome/browser/data_use_measurement/data_use_web_contents_observer.h
index 978ec4733b5f1299a239d25e0171ab868fe4d0ef..308b3b521ec0c10846ec29a8fadfdf9e9166e6b1 100644
--- a/chrome/browser/data_use_measurement/data_use_web_contents_observer.h
+++ b/chrome/browser/data_use_measurement/data_use_web_contents_observer.h
@@ -32,13 +32,22 @@
 
   ~DataUseWebContentsObserver() override;
 
-  // WebContentsObserver implementation:
+  // WebContentsObserver:
+  // Called when a render frame host is created.
   void RenderFrameCreated(content::RenderFrameHost* render_frame_host) override;
+
+  // Called when a render frame host is deleted.
   void RenderFrameDeleted(content::RenderFrameHost* render_frame_host) override;
+
+  // Called when a navigation is started.
   void DidStartNavigation(
       content::NavigationHandle* navigation_handle) override;
-  void ReadyToCommitNavigation(
+
+  // Called when a navigation is completed.
+  void DidFinishNavigation(
       content::NavigationHandle* navigation_handle) override;
+
+  // Called when a navigation is redirected.
   void DidRedirectNavigation(
       content::NavigationHandle* navigation_handle) override;