Revert of service worker: Add CHECKs to catch if SWProcessManager isn't releasing ref counts.

content/browser/service_worker/service_worker_process_manager.cc

Index: content/browser/service_worker/service_worker_process_manager.cc
diff --git a/content/browser/service_worker/service_worker_process_manager.cc b/content/browser/service_worker/service_worker_process_manager.cc
index cb401d2720a9d9438b3512c95f10975736fa9868..f3ff0482c8fea21f03f94af83e4555d9e8fd1687 100644
--- a/content/browser/service_worker/service_worker_process_manager.cc
+++ b/content/browser/service_worker/service_worker_process_manager.cc
@@ -193,9 +193,7 @@
     return;
   }
 
-  // TODO(falken): Revert to DCHECK. Temporary check for debugging
-  // crbug.com/639193
-  CHECK(!base::ContainsKey(instance_info_, embedded_worker_id))
+  DCHECK(!base::ContainsKey(instance_info_, embedded_worker_id))
       << embedded_worker_id << " already has a process allocated";
 
   if (can_use_existing_process) {
@@ -258,9 +256,7 @@
 
   if (IsShutdown()) {
     // Shutdown already released all instances.
-    // TODO(falken): Revert to DCHECK. Temporary check for debugging
-    // crbug.com/639193
-    CHECK(instance_info_.empty());
+    DCHECK(instance_info_.empty());
     return;
   }
 
@@ -275,16 +271,12 @@
   RenderProcessHost* rph = NULL;
   if (info->second.site_instance.get()) {
     rph = info->second.site_instance->GetProcess();
-    // TODO(falken): Revert to DCHECK. Temporary check for debugging
-    // crbug.com/639193
-    CHECK_EQ(info->second.process_id, rph->GetID())
+    DCHECK_EQ(info->second.process_id, rph->GetID())
         << "A SiteInstance's process shouldn't get destroyed while we're "
            "holding a reference to it. Was the reference actually held?";
   } else {
-    // TODO(falken): Revert to DCHECK. Temporary check for debugging
-    // crbug.com/639193
     rph = RenderProcessHost::FromID(info->second.process_id);
-    CHECK(rph)
+    DCHECK(rph)
         << "Process " << info->second.process_id
         << " was destroyed unexpectedly. Did we actually hold a reference?";
   }