Reland: Refactor code that defers extension background page loading

extensions/browser/test_extensions_browser_client.cc

Index: extensions/browser/test_extensions_browser_client.cc
diff --git a/extensions/browser/test_extensions_browser_client.cc b/extensions/browser/test_extensions_browser_client.cc
index dcd467f3ceea91f2db9e85e5e9f50d91ac44a310..a01b128a0b773c1826104046784694a2f290f4a3 100644
--- a/extensions/browser/test_extensions_browser_client.cc
+++ b/extensions/browser/test_extensions_browser_client.cc
@@ -15,7 +15,9 @@ namespace extensions {
 
 TestExtensionsBrowserClient::TestExtensionsBrowserClient(
     BrowserContext* main_context)
-    : main_context_(main_context), incognito_context_(NULL) {
+    : main_context_(main_context),
+      incognito_context_(NULL),
+      process_manager_delegate_(NULL) {
   DCHECK(main_context_);
   DCHECK(!main_context_->IsOffTheRecord());
 }
@@ -116,14 +118,9 @@ void TestExtensionsBrowserClient::GetEarlyExtensionPrefsObservers(
     content::BrowserContext* context,
     std::vector<ExtensionPrefsObserver*>* observers) const {}
 
-bool TestExtensionsBrowserClient::DeferLoadingBackgroundHosts(
-    BrowserContext* context) const {
-  return false;
-}
-
-bool TestExtensionsBrowserClient::IsBackgroundPageAllowed(
-    BrowserContext* context) const {
-  return true;
+ProcessManagerDelegate* TestExtensionsBrowserClient::GetProcessManagerDelegate()
+    const {
+  return process_manager_delegate_;
 }
 
 scoped_ptr<ExtensionHostDelegate>