Revert 283678 "Refactor code that defers extension background pa..."

This broke Chrome OS valgrind bots, for example:
http://build.chromium.org/p/chromium.memory.fyi/builders/Chromium%20OS%20%28valgrind%29%284%29/builds/27033

> Refactor code that defers extension background page loading
> 
> src/extensions depends on chrome::NOTIFICATION_PROFILE_CREATED to support deferred loading of extension background pages when the profile isn't ready yet. This is a layering violation.
> 
> * Remove Chrome concepts like "browser window ready" and "profile created" from ProcessManager. Introduce ProcessManagerDelegate with a general concept of deferring background page loading.
> * Consolidate all the tricky Chrome-specific background page loading rules into ChromeProcessManagerDelegate. This keeps all the rules in one place. Annotate each block of special case code with the bug that inspired it.
> * Extend unit test coverage for ProcessManager.
> 
> This will make it easier to eliminate chrome::NOTIFICATION_PROFILE_DESTROYED in ProcessManager in a later CL.
> 
> BUG=392658
> TEST=unit_tests ProcessManagerTest, browser_tests ProcessManagerBrowserTest, manual
> 
> Review URL: https://codereview.chromium.org/381283002

TBR=jamescook@chromium.org

Review URL: https://codereview.chromium.org/399153002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@283801 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 8 insertions, 3 deletions

diff --git a/apps/shell/browser/shell_extensions_browser_client.cc b/apps/shell/browser/shell_extensions_browser_client.cc
index 54b0df8..76f4a83 100644
--- a/apps/shell/browser/shell_extensions_browser_client.cc
+++ b/apps/shell/browser/shell_extensions_browser_client.cc
@@ -183,9 +183,14 @@ void ShellExtensionsBrowserClient::GetEarlyExtensionPrefsObservers(
     content::BrowserContext* context,
     std::vector<ExtensionPrefsObserver*>* observers) const {}
 
-ProcessManagerDelegate*
-ShellExtensionsBrowserClient::GetProcessManagerDelegate() const {
-  return NULL;
+bool ShellExtensionsBrowserClient::DeferLoadingBackgroundHosts(
+    BrowserContext* context) const {
+  return false;
+}
+
+bool ShellExtensionsBrowserClient::IsBackgroundPageAllowed(
+    BrowserContext* context) const {
+  return true;
 }
 
 scoped_ptr<ExtensionHostDelegate>