Move data_reduction_proxy_enabled pref to profile_impl_io_data.

chrome/browser/profiles/profile_io_data.h

Index: chrome/browser/profiles/profile_io_data.h
diff --git a/chrome/browser/profiles/profile_io_data.h b/chrome/browser/profiles/profile_io_data.h
index f49e3e847b17319e435ec05df5167ce6b23083b5..95c7aeb454cd227ef8b4ffd5e25ecc045bb3fdbc 100644
--- a/chrome/browser/profiles/profile_io_data.h
+++ b/chrome/browser/profiles/profile_io_data.h
@@ -183,12 +183,6 @@ class ProfileIOData {
     return &safe_browsing_enabled_;
   }
 
-  // TODO(feng): move the function to protected area.
-  // IsDataReductionProxyEnabled() should be used as public API.
-  BooleanPrefMember* data_reduction_proxy_enabled() const {
-    return &data_reduction_proxy_enabled_;
-  }
-
   BooleanPrefMember* printing_enabled() const {
     return &printing_enabled_;
   }
@@ -261,7 +255,7 @@ class ProfileIOData {
 
   // Returns whether or not data reduction proxy is enabled in the browser
   // instance on which this profile resides.
-  bool IsDataReductionProxyEnabled() const;
+  virtual bool IsDataReductionProxyEnabled() const;
 
   void set_client_cert_store_factory_for_testing(
     const base::Callback<scoped_ptr<net::ClientCertStore>()>& factory) {
@@ -614,7 +608,6 @@ class ProfileIOData {
   mutable BooleanPrefMember enable_do_not_track_;
   mutable BooleanPrefMember force_safesearch_;
   mutable BooleanPrefMember safe_browsing_enabled_;
-  mutable BooleanPrefMember data_reduction_proxy_enabled_;
   mutable BooleanPrefMember printing_enabled_;
   mutable BooleanPrefMember sync_disabled_;
   mutable BooleanPrefMember signin_allowed_;