Add Finch experiment for selectively bypassing proxies.

components/data_reduction_proxy/browser/data_reduction_proxy_protocol.h

Index: components/data_reduction_proxy/browser/data_reduction_proxy_protocol.h
diff --git a/components/data_reduction_proxy/browser/data_reduction_proxy_protocol.h b/components/data_reduction_proxy/browser/data_reduction_proxy_protocol.h
index 5598c26acc7f34ff35aa7ad5fb8a8bf6fa9da71e..03c2a8f100b8f47f09b75faea15d7cde7a6eca5a 100644
--- a/components/data_reduction_proxy/browser/data_reduction_proxy_protocol.h
+++ b/components/data_reduction_proxy/browser/data_reduction_proxy_protocol.h
@@ -14,6 +14,7 @@ class TimeDelta;
 
 namespace net {
 class HttpResponseHeaders;
+class ProxyInfo;
 class ProxyServer;
 class URLRequest;
 }
@@ -33,6 +34,17 @@ bool MaybeBypassProxyAndPrepareToRetry(
     const net::HttpResponseHeaders* original_response_headers,
     scoped_refptr<net::HttpResponseHeaders>* override_response_headers);
 
+// Configure |result| to proceed directly to the origin if |result|'s current
+// proxy is the data reduction proxy, the
+// |net::LOAD_BYPASS_DATA_REDUCTION_PROXY| |load_flag| is set, and the
+// DataCompressionProxyCriticalBypass Finch trial is set.
+// This handler is intended to be invoked only by
+// |ChromeNetworkDelegate.NotifyResolveProxy|.
+void OnResolveProxyHandler(const GURL& url,
+                           int load_flags,
+                           const DataReductionProxyParams* params,
+                           net::ProxyInfo* result);
+
 // Returns true if the request method is idempotent. Only idempotent requests
 // are retried on a bypass. Visible as part of the public API for testing.
 bool IsRequestIdempotent(const net::URLRequest* request);