media: Send chrome-cache: frfr on first request.

media/blink/resource_multibuffer_data_provider.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/blink/resource_multibuffer_data_provider.h"
 
 #include <stddef.h>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 67 matching lines @@
         FROM_HERE, base::Bind(&ResourceMultiBufferDataProvider::Terminate,
                               weak_factory_.GetWeakPtr()));
     return;
   }
 
   request.SetHTTPHeaderField(
       WebString::FromUTF8(net::HttpRequestHeaders::kRange),
       WebString::FromUTF8(
           net::HttpByteRange::RightUnbounded(byte_pos()).GetHeaderValue()));
 
+  if (url_data_->length() == kPositionNotSpecified &&
+      url_data_->CachedSize() == 0 && url_data_->BytesReadFromCache() == 0) {
+    // This lets flywheel know that we don't have anything previously cached

[bengr, 2017/05/03 21:37:42]

In code we call this the data reduction proxy, not flywheel.

[hubbe, 2017/05/05 20:51:45]

Done.

+    // data for this resource. We can only send it if this is the first request
+    // for this resource.
+    request.SetHTTPHeaderField(WebString::FromUTF8("chrome-proxy"),
+                               WebString::FromUTF8("frfr"));
+  }
+
   // We would like to send an if-match header with the request to
   // tell the remote server that we really can't handle files other
   // than the one we already started playing. Unfortunately, doing
   // so will disable the http cache, and possibly other proxies
   // along the way. See crbug/504194 and crbug/689989 for more information.
 
   url_data_->frame()->SetReferrerForRequest(request, blink::WebURL());
 
   // Disable compression, compression for audio/video doesn't make sense...
   request.SetHTTPHeaderField(
@@ skipping 452 matching lines @@
   }
 
   if (byte_pos() != first_byte_position) {
     return false;
   }
 
   return true;
 }
 
 }  // namespace media