Add data reduction functionality to all platforms.

chrome/browser/net/chrome_network_delegate.cc

Index: chrome/browser/net/chrome_network_delegate.cc
diff --git a/chrome/browser/net/chrome_network_delegate.cc b/chrome/browser/net/chrome_network_delegate.cc
index d69e0eb1a4c4397d0fd21c01eb3284d807baaaf7..d4e16041f72803f4a5acb015cd206cb0491f631d 100644
--- a/chrome/browser/net/chrome_network_delegate.cc
+++ b/chrome/browser/net/chrome_network_delegate.cc
@@ -134,15 +134,11 @@ void UpdateContentLengthPrefs(
       profile->IsOffTheRecord()) {
     return;
   }
-#if defined(OS_ANDROID) && defined(SPDY_PROXY_AUTH_ORIGIN)
   // If Android ever goes multi profile, the profile should be passed so that
   // the browser preference will be taken.

[Ryan Sleevi, 2014/08/28 17:21:01]

1) This comment should be updated
2) You should "do the right thing" here w/r/t |profile|

[Not at Google. Contact bengr, 2014/08/28 18:59:28]

Good catch! Done.

Note that the "received content length" are stored in the local_state pref, so
the existing argument to UpdateContentLengthPrefs is still correct.

   bool with_data_reduction_proxy_enabled =
       ProfileManager::GetActiveUserProfile()->GetPrefs()->GetBoolean(
           data_reduction_proxy::prefs::kDataReductionProxyEnabled);
-#else
-  bool with_data_reduction_proxy_enabled = false;
-#endif
 
   data_reduction_proxy::UpdateContentLengthPrefs(received_content_length,
                                          original_content_length,