Enable QUIC for proxies only when QUIC is enabled

chrome/browser/io_thread.h

Index: chrome/browser/io_thread.h
diff --git a/chrome/browser/io_thread.h b/chrome/browser/io_thread.h
index 9dad42fe17928da7a8e928acb5968d042945c6b0..8dd4759927808adf1d28fa2ce464e7da5280664c 100644
--- a/chrome/browser/io_thread.h
+++ b/chrome/browser/io_thread.h
@@ -204,11 +204,6 @@ class IOThread : public content::BrowserThreadDelegate {
         bool is_quic_allowed_by_policy,
         net::HttpNetworkSession::Params* params);
 
-    // Returns true if QUIC should be enabled for data reduction proxy, either
-    // as a result of a field trial or a command line flag.
-    static bool ShouldEnableQuicForDataReductionProxy(
-        const base::CommandLine& command_line);
-
    private:
     // Map from name to value for all parameters associate with a field trial.
     using VariationParameters = std::map<std::string, std::string>;
@@ -272,13 +267,6 @@ class IOThread : public content::BrowserThreadDelegate {
                                  base::StringPiece quic_trial_group,
                                  bool quic_allowed_by_policy);
 
-    // Returns true if QUIC should be enabled for proxies, either as a result of
-    // a field trial or a command line flag.
-    static bool ShouldEnableQuicForProxies(
-        const base::CommandLine& command_line,
-        base::StringPiece quic_trial_group,
-        bool quic_allowed_by_policy);
-
     // Returns true if the selection of the ephemeral port in bind() should be
     // performed by Chromium, and false if the OS should select the port.  The
     // OS option is used to prevent Windows from posting a security warning
@@ -429,10 +417,6 @@ class IOThread : public content::BrowserThreadDelegate {
 
   base::TimeTicks creation_time() const;
 
-  // Returns true if QUIC should be enabled for data reduction proxy, either as
-  // a result of a field trial or a command line flag.
-  static bool ShouldEnableQuicForDataReductionProxy();
-
   // Returns the callback for updating data use prefs.
   const metrics::UpdateUsagePrefCallbackType& GetMetricsDataUseForwarder();