Remove //chrome dependency from ExtensionPrefs

apps/shell/browser/shell_extensions_browser_client.h

Index: apps/shell/browser/shell_extensions_browser_client.h
diff --git a/apps/shell/browser/shell_extensions_browser_client.h b/apps/shell/browser/shell_extensions_browser_client.h
index c5f5292a29cdd679785e3b14d3b0cb9f03f2a920..112dd3b9260d8cd3a83be47c265e19a11e1a639d 100644
--- a/apps/shell/browser/shell_extensions_browser_client.h
+++ b/apps/shell/browser/shell_extensions_browser_client.h
@@ -59,6 +59,8 @@ class ShellExtensionsBrowserClient : public ExtensionsBrowserClient {
   virtual ExtensionSystemProvider* GetExtensionSystemFactory() OVERRIDE;
   virtual void RegisterExtensionFunctions(
       ExtensionFunctionRegistry* registry) const OVERRIDE;
+  virtual void AddExtensionPrefsObservers(content::BrowserContext* context,

[James Cook, 2014/04/01 18:45:03]

nit: In the interface could you put this next to GetPrefServiceForContext() so
all the prefs stuff is together?

[Ken Rockot(use gerrit already), 2014/04/01 21:34:59]

Done.

+                                          ExtensionPrefs* prefs) const OVERRIDE;
 
  private:
   // The single BrowserContext for app_shell. Not owned.