Fix two bugs in recording web timing histograms.

chrome/renderer/navigation_state.h

Index: chrome/renderer/navigation_state.h
diff --git a/chrome/renderer/navigation_state.h b/chrome/renderer/navigation_state.h
index ab34b123b08d2a8b967c82d4ae799b894fd0b62d..a53bbaadeb6c37ca9ef74827632769df40ffa544 100644
--- a/chrome/renderer/navigation_state.h
+++ b/chrome/renderer/navigation_state.h
@@ -160,6 +160,13 @@ class NavigationState : public WebKit::WebDataSource::ExtraData {
     load_histograms_recorded_ = value;
   }
 
+  bool web_timing_histograms_recorded() const {
+    return web_timing_histograms_recorded_;
+  }
+  void set_web_timing_histograms_recorded(bool value) {
+    web_timing_histograms_recorded_ = value;
+  }
+
   // True if we have already processed the "DidCommitLoad" event for this
   // request.  Used by session history.
   bool request_committed() const { return request_committed_; }
@@ -281,6 +288,7 @@ class NavigationState : public WebKit::WebDataSource::ExtraData {
   base::Time first_paint_time_;
   base::Time first_paint_after_load_time_;
   bool load_histograms_recorded_;
+  bool web_timing_histograms_recorded_;
   bool request_committed_;
   bool is_content_initiated_;
   int32 pending_page_id_;