Make session restore forced tab load delay Finch configurable, and separate first tab loads from su…

chrome/browser/sessions/tab_loader.cc

Index: chrome/browser/sessions/tab_loader.cc
diff --git a/chrome/browser/sessions/tab_loader.cc b/chrome/browser/sessions/tab_loader.cc
index bf1b00a0258d2b777399dc95c5984891bc02b319..98226b717633683458e3e6a51d82a1e221f9be37 100644
--- a/chrome/browser/sessions/tab_loader.cc
+++ b/chrome/browser/sessions/tab_loader.cc
@@ -117,7 +117,7 @@ void TabLoader::StartLoading(const std::vector<RestoredTab>& tabs) {
     delegate_ = TabLoaderDelegate::Create(this);
     // There is already at least one tab loading (the active tab). As such we
     // only have to start the timeout timer here.
-    StartTimer();
+    StartFirstTimer();
   }
 }
 
@@ -152,6 +152,13 @@ void TabLoader::LoadNextTab() {
     StartTimer();
 }
 
+void TabLoader::StartFirstTimer() {
+  force_load_timer_.Stop();
+  force_load_timer_.Start(FROM_HERE,
+                          delegate_->GetFirstTabLoadingTimeout(),
+                          this, &TabLoader::ForceLoadTimerFired);
+}
+
 void TabLoader::StartTimer() {
   force_load_timer_.Stop();
   force_load_timer_.Start(FROM_HERE,