Make SpdyHeaderBlock non-copyable.

net/quic/quic_chromium_client_stream.cc

Index: net/quic/quic_chromium_client_stream.cc
diff --git a/net/quic/quic_chromium_client_stream.cc b/net/quic/quic_chromium_client_stream.cc
index 9a0da07dde963110fa13578f59fadfac1ccecd48..e5cd4c337bdc05853fd519b0da5281e13c3cefe4 100644
--- a/net/quic/quic_chromium_client_stream.cc
+++ b/net/quic/quic_chromium_client_stream.cc
@@ -6,6 +6,7 @@
 
 #include <utility>
 
+#include "base/bind_helpers.h"
 #include "base/callback_helpers.h"
 #include "base/location.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ -42,7 +43,8 @@ void QuicChromiumClientStream::OnStreamHeadersComplete(bool fin,
   if (decompressed_headers().empty() && !decompressed_trailers().empty()) {
     DCHECK(trailers_decompressed());
     // The delegate will read the trailers via a posted task.
-    NotifyDelegateOfHeadersCompleteLater(received_trailers(), frame_len);
+    NotifyDelegateOfHeadersCompleteLater(received_trailers().Clone(),
+                                         frame_len);
   } else {
     DCHECK(!headers_delivered_);
     SpdyHeaderBlock headers;
@@ -58,7 +60,7 @@ void QuicChromiumClientStream::OnStreamHeadersComplete(bool fin,
     session_->OnInitialHeadersComplete(id(), headers);
 
     // The delegate will read the headers via a posted task.
-    NotifyDelegateOfHeadersCompleteLater(headers, frame_len);
+    NotifyDelegateOfHeadersCompleteLater(std::move(headers), frame_len);
   }
 }
 
@@ -81,7 +83,7 @@ void QuicChromiumClientStream::OnInitialHeadersComplete(
   session_->OnInitialHeadersComplete(id(), header_block);
 
   // The delegate will read the headers via a posted task.
-  NotifyDelegateOfHeadersCompleteLater(header_block, frame_len);
+  NotifyDelegateOfHeadersCompleteLater(std::move(header_block), frame_len);
 }
 
 void QuicChromiumClientStream::OnTrailingHeadersComplete(
@@ -89,7 +91,7 @@ void QuicChromiumClientStream::OnTrailingHeadersComplete(
     size_t frame_len,
     const QuicHeaderList& header_list) {
   QuicSpdyStream::OnTrailingHeadersComplete(fin, frame_len, header_list);
-  NotifyDelegateOfHeadersCompleteLater(received_trailers(), frame_len);
+  NotifyDelegateOfHeadersCompleteLater(received_trailers().Clone(), frame_len);
 }
 
 void QuicChromiumClientStream::OnPromiseHeadersComplete(
@@ -245,11 +247,11 @@ bool QuicChromiumClientStream::CanWrite(const CompletionCallback& callback) {
 }
 
 void QuicChromiumClientStream::NotifyDelegateOfHeadersCompleteLater(
-    const SpdyHeaderBlock& headers,
+    SpdyHeaderBlock headers,
     size_t frame_len) {
-  RunOrBuffer(
-      base::Bind(&QuicChromiumClientStream::NotifyDelegateOfHeadersComplete,
-                 weak_factory_.GetWeakPtr(), headers, frame_len));
+  RunOrBuffer(base::Bind(
+      &QuicChromiumClientStream::NotifyDelegateOfHeadersComplete,
+      weak_factory_.GetWeakPtr(), base::Passed(std::move(headers)), frame_len));
 }
 
 void QuicChromiumClientStream::NotifyDelegateOfHeadersComplete(