CrOS: Add print statements to help debug BrowserProcessImpl::Unpin crash.

chrome/browser/lifetime/keep_alive_registry.cc

Index: chrome/browser/lifetime/keep_alive_registry.cc
diff --git a/chrome/browser/lifetime/keep_alive_registry.cc b/chrome/browser/lifetime/keep_alive_registry.cc
index f61ef82706df2cd271f97e0e78fa3266f35d7a13..862c33180bf0f618938dd70bf472bae82ea98808 100644
--- a/chrome/browser/lifetime/keep_alive_registry.cc
+++ b/chrome/browser/lifetime/keep_alive_registry.cc
@@ -88,6 +88,7 @@ void KeepAliveRegistry::Register(KeepAliveOrigin origin,
   ++registered_keep_alives_[origin];
   ++registered_count_;
 
+  LOG(ERROR) << "Registered: " << origin << ", Count:" << registered_count_;
   if (restart == KeepAliveRestartOption::ENABLED) {
     ++restart_allowed_keep_alives_[origin];
     ++restart_allowed_count_;
@@ -113,6 +114,7 @@ void KeepAliveRegistry::Unregister(KeepAliveOrigin origin,
   --registered_count_;
   DCHECK_GE(registered_count_, 0);
   DecrementCount(origin, &registered_keep_alives_);
+  LOG(ERROR) << "Unregistered: " << origin << ", Count:" << registered_count_;
 
   if (restart == KeepAliveRestartOption::ENABLED) {
     --restart_allowed_count_;