1 files changed, 26 insertions, 6 deletions
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index 7a4e607..ee3eaa4 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -9,7 +9,6 @@
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/lazy_instance.h"
-#include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/metrics/stats_counters.h"
 #include "base/strings/string16.h"
@@ -399,6 +398,16 @@ WebContentsImpl::~WebContentsImpl() {
   }
 #endif
 
+  // OnCloseStarted isn't called in unit tests.
+  if (!close_start_time_.is_null()) {
+    base::TimeTicks now = base::TimeTicks::Now();
+    base::TimeTicks unload_start_time = close_start_time_;
+    if (!before_unload_end_time_.is_null())
+      unload_start_time = before_unload_end_time_;
+    UMA_HISTOGRAM_TIMES("Tab.Close", now - close_start_time_);
+    UMA_HISTOGRAM_TIMES("Tab.Close.UnloadTime", now - unload_start_time);
+  }
+
   FOR_EACH_OBSERVER(WebContentsObserver,
                     observers_,
                     WebContentsImplDestroyed());
@@ -1939,10 +1948,23 @@ RendererPreferences* WebContentsImpl::GetMutableRendererPrefs() {
   return &renderer_preferences_;
 }
 
+void WebContentsImpl::SetNewTabStartTime(const base::TimeTicks& time) {
+  new_tab_start_time_ = time;
+}
+
+base::TimeTicks WebContentsImpl::GetNewTabStartTime() const {
+  return new_tab_start_time_;
+}
+
 void WebContentsImpl::Close() {
   Close(GetRenderViewHost());
 }
 
+void WebContentsImpl::OnCloseStarted() {
+  if (close_start_time_.is_null())
+    close_start_time_ = base::TimeTicks::Now();
+}
+
 void WebContentsImpl::DragSourceEndedAt(int client_x, int client_y,
     int screen_x, int screen_y, WebKit::WebDragOperation operation) {
   if (browser_plugin_embedder_.get())
@@ -3476,11 +3498,9 @@ void WebContentsImpl::WorkerCrashed() {
 void WebContentsImpl::BeforeUnloadFiredFromRenderManager(
     bool proceed, const base::TimeTicks& proceed_time,
     bool* proceed_to_fire_unload) {
-  FOR_EACH_OBSERVER(WebContentsObserver, observers_,
-                    BeforeUnloadFired(proceed_time));
+  before_unload_end_time_ = proceed_time;
   if (delegate_)
     delegate_->BeforeUnloadFired(this, proceed, proceed_to_fire_unload);
-  // Note: |this| can be deleted at this point.
 }
 
 void WebContentsImpl::RenderViewGoneFromRenderManager(
@@ -3621,8 +3641,8 @@ void WebContentsImpl::OnDialogClosed(RenderViewHost* rvh,
     DidStopLoading(rvh);
     controller_.DiscardNonCommittedEntries();
 
-    FOR_EACH_OBSERVER(WebContentsObserver, observers_,
-                      BeforeUnloadDialogCancelled());
+    close_start_time_ = base::TimeTicks();
+    before_unload_end_time_ = base::TimeTicks();
   }
   is_showing_before_unload_dialog_ = false;
   static_cast<RenderViewHostImpl*>(