[TooManyTabs] Add TabNavigationThrottle

chrome/browser/resource_coordinator/tab_manager_web_contents_data.cc

Index: chrome/browser/resource_coordinator/tab_manager_web_contents_data.cc
diff --git a/chrome/browser/resource_coordinator/tab_manager_web_contents_data.cc b/chrome/browser/resource_coordinator/tab_manager_web_contents_data.cc
index af91c398ac0163e9f1f4f1a940b81e12767f7434..40f5be9a9354812d15c79fdb68bac83312b687f0 100644
--- a/chrome/browser/resource_coordinator/tab_manager_web_contents_data.cc
+++ b/chrome/browser/resource_coordinator/tab_manager_web_contents_data.cc
@@ -9,7 +9,9 @@
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/engagement/site_engagement_service.h"
 #include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/resource_coordinator/tab_manager.h"
 #include "content/public/browser/browser_thread.h"
+#include "content/public/browser/navigation_handle.h"
 #include "content/public/browser/web_contents.h"
 
 using base::TimeTicks;
@@ -34,6 +36,22 @@ void TabManager::WebContentsData::DidStartLoading() {
   SetDiscardState(false);
 }
 
+void TabManager::WebContentsData::DidStopLoading() {
+  // TODO(zhenw): Switch to use tab done loading signal when it is ready.
+  if (!tab_data_.has_finished_loading) {
+    tab_data_.has_finished_loading = true;
+    g_browser_process->GetTabManager()->HasFinishedLoadingTab(web_contents());
+  }
+}
+
+void TabManager::WebContentsData::DidStartNavigation(
+    content::NavigationHandle* navigation_handle) {
+  if (!navigation_handle->IsInMainFrame())
+    return;
+
+  tab_data_.has_finished_loading = false;
+}
+
 void TabManager::WebContentsData::WebContentsDestroyed() {
   // If Chrome is shutting down, ignore this event.
   if (g_browser_process->IsShuttingDown())
@@ -168,6 +186,7 @@ TabManager::WebContentsData::Data::Data()
     : is_discarded(false),
       discard_count(0),
       is_recently_audible(false),
+      has_finished_loading(false),
       last_audio_change_time(TimeTicks::UnixEpoch()),
       last_discard_time(TimeTicks::UnixEpoch()),
       last_reload_time(TimeTicks::UnixEpoch()),
@@ -178,6 +197,7 @@ TabManager::WebContentsData::Data::Data()
 bool TabManager::WebContentsData::Data::operator==(const Data& right) const {
   return is_discarded == right.is_discarded &&
          is_recently_audible == right.is_recently_audible &&
+         has_finished_loading == right.has_finished_loading &&
          last_audio_change_time == right.last_audio_change_time &&
          last_discard_time == right.last_discard_time &&
          last_reload_time == right.last_reload_time &&