Revert of Remove deprecated extension notifications from ProcessManager

extensions/browser/process_manager.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "extensions/browser/process_manager.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
@@ skipping 211 matching lines @@
       incognito_context, original_context, original_manager);
 }
 
 ProcessManager::ProcessManager(BrowserContext* context,
                                BrowserContext* original_context)
     : site_instance_(SiteInstance::Create(context)),
       startup_background_hosts_created_(false),
       devtools_callback_(base::Bind(&ProcessManager::OnDevToolsStateChanged,
                                     base::Unretained(this))),
       last_background_close_sequence_id_(0),
-      weak_ptr_factory_(this),
-      extension_registry_observer_(this) {
-  extension_registry_observer_.Add(ExtensionRegistry::Get(original_context));
+      weak_ptr_factory_(this) {
   registrar_.Add(this, chrome::NOTIFICATION_EXTENSIONS_READY,
                  content::Source<BrowserContext>(original_context));
+  registrar_.Add(this,
+                 chrome::NOTIFICATION_EXTENSION_LOADED_DEPRECATED,
+                 content::Source<BrowserContext>(original_context));
+  registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_UNLOADED_DEPRECATED,
+                 content::Source<BrowserContext>(original_context));
   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_HOST_DESTROYED,
                  content::Source<BrowserContext>(context));
   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_HOST_VIEW_SHOULD_CLOSE,
                  content::Source<BrowserContext>(context));
   registrar_.Add(this, content::NOTIFICATION_RENDER_VIEW_HOST_CHANGED,
                  content::NotificationService::AllSources());
   registrar_.Add(this, content::NOTIFICATION_WEB_CONTENTS_CONNECTED,
                  content::NotificationService::AllSources());
   registrar_.Add(this, chrome::NOTIFICATION_PROFILE_CREATED,
                  content::Source<BrowserContext>(original_context));
@@ skipping 403 matching lines @@
        // Don't load background hosts now if the loading should be deferred.
        // Instead they will be loaded when a browser window for this profile
        // (or an incognito profile from this profile) is ready.
        if (DeferLoadingBackgroundHosts())
          break;
 
       CreateBackgroundHostsForProfileStartup();
       break;
     }
 
+    case chrome::NOTIFICATION_EXTENSION_LOADED_DEPRECATED: {
+      BrowserContext* context = content::Source<BrowserContext>(source).ptr();
+      ExtensionSystem* system = ExtensionSystem::Get(context);
+      if (system->ready().is_signaled()) {
+        // The extension system is ready, so create the background host.
+        const Extension* extension =
+            content::Details<const Extension>(details).ptr();
+        CreateBackgroundHostForExtensionLoad(this, extension);
+      }
+      break;
+    }
+
+    case chrome::NOTIFICATION_EXTENSION_UNLOADED_DEPRECATED: {
+      const Extension* extension =
+          content::Details<UnloadedExtensionInfo>(details)->extension;
+      for (ExtensionHostSet::iterator iter = background_hosts_.begin();
+           iter != background_hosts_.end(); ++iter) {
+        ExtensionHost* host = *iter;
+        if (host->extension_id() == extension->id()) {
+          CloseBackgroundHost(host);
+          break;
+        }
+      }
+      UnregisterExtension(extension->id());
+      break;
+    }
+
     case chrome::NOTIFICATION_EXTENSION_HOST_DESTROYED: {
       ExtensionHost* host = content::Details<ExtensionHost>(details).ptr();
       if (background_hosts_.erase(host)) {
         ClearBackgroundPageData(host->extension()->id());
         background_page_data_[host->extension()->id()].since_suspended.reset(
             new base::ElapsedTimer());
       }
       break;
     }
 
@@ skipping 53 matching lines @@
       // destructor is called too late in the shutdown sequence.
       CloseBackgroundHosts();
       break;
     }
 
     default:
       NOTREACHED();
   }
 }
 
-void ProcessManager::OnExtensionLoaded(content::BrowserContext* browser_context,
-                                       const Extension* extension) {
-  if (ExtensionSystem::Get(browser_context)->ready().is_signaled()) {
-    // The extension system is ready, so create the background host.
-    CreateBackgroundHostForExtensionLoad(this, extension);
-  }
-}
-
-void ProcessManager::OnExtensionUnloaded(
-    content::BrowserContext* browser_context,
-    const Extension* extension,
-    UnloadedExtensionInfo::Reason reason) {
-  for (ExtensionHostSet::iterator iter = background_hosts_.begin();
-       iter != background_hosts_.end();
-       ++iter) {
-    ExtensionHost* host = *iter;
-    if (host->extension_id() == extension->id()) {
-      CloseBackgroundHost(host);
-      break;
-    }
-  }
-  UnregisterExtension(extension->id());
-}
-
 void ProcessManager::OnDevToolsStateChanged(
     content::DevToolsAgentHost* agent_host,
     bool attached) {
   RenderViewHost* rvh = agent_host->GetRenderViewHost();
   // Ignore unrelated notifications.
   if (!rvh ||
       rvh->GetSiteInstance()->GetProcess()->GetBrowserContext() !=
           GetBrowserContext())
     return;
   if (GetViewType(WebContents::FromRenderViewHost(rvh)) !=
@@ skipping 164 matching lines @@
     const Extension* extension =
         registry->enabled_extensions().GetExtensionOrAppByURL(url);
     if (extension && !IncognitoInfo::IsSplitMode(extension)) {
       return original_manager_->GetSiteInstanceForURL(url);
     }
   }
   return ProcessManager::GetSiteInstanceForURL(url);
 }
 
 }  // namespace extensions