Wrapped data reduction proxy initialization into its own class

chrome/browser/profiles/profile_impl.h

Index: chrome/browser/profiles/profile_impl.h
diff --git a/chrome/browser/profiles/profile_impl.h b/chrome/browser/profiles/profile_impl.h
index 49d765f1e339432f738bc4375ffabc8ecfbaf9ab..810d726ba9f73a895925b7849ead94db9bfe4fe5 100644
--- a/chrome/browser/profiles/profile_impl.h
+++ b/chrome/browser/profiles/profile_impl.h
@@ -41,12 +41,6 @@ namespace base {
 class SequencedTaskRunner;
 }
 
-namespace data_reduction_proxy {
-class DataReductionProxyParams;
-}
-
-class DataReductionProxyChromeSettings;
-
 namespace domain_reliability {
 class DomainReliabilityMonitor;
 }