Removes the chrome-proxy-ect header from M59.

components/data_reduction_proxy/core/common/data_reduction_proxy_headers.cc

Index: components/data_reduction_proxy/core/common/data_reduction_proxy_headers.cc
diff --git a/components/data_reduction_proxy/core/common/data_reduction_proxy_headers.cc b/components/data_reduction_proxy/core/common/data_reduction_proxy_headers.cc
index b3c2f6caed1fe8ad6f0150081ebc518cff16606f..b22ead117605921d6339e1db33e9efd8ae14265a 100644
--- a/components/data_reduction_proxy/core/common/data_reduction_proxy_headers.cc
+++ b/components/data_reduction_proxy/core/common/data_reduction_proxy_headers.cc
@@ -28,7 +28,6 @@ using base::TimeDelta;
 namespace {
 
 const char kChromeProxyHeader[] = "chrome-proxy";
-const char kChromeProxyECTHeader[] = "chrome-proxy-ect";
 const char kChromeProxyAcceptTransformHeader[] =
     "chrome-proxy-accept-transform";
 const char kChromeProxyContentTransformHeader[] =
@@ -126,10 +125,6 @@ const char* chrome_proxy_header() {
   return kChromeProxyHeader;
 }
 
-const char* chrome_proxy_ect_header() {
-  return kChromeProxyECTHeader;
-}
-
 const char* chrome_proxy_accept_transform_header() {
   return kChromeProxyAcceptTransformHeader;
 }