Make WebURLLoader capable of retaining received buffers.

chrome/renderer/extensions/extension_localization_peer.cc

Index: chrome/renderer/extensions/extension_localization_peer.cc
diff --git a/chrome/renderer/extensions/extension_localization_peer.cc b/chrome/renderer/extensions/extension_localization_peer.cc
index 8c20331d8ab7007dc7ef566f5b23d43311ff0709..7208c2af44608ac6f55a39d7603eee2506deb91f 100644
--- a/chrome/renderer/extensions/extension_localization_peer.cc
+++ b/chrome/renderer/extensions/extension_localization_peer.cc
@@ -14,6 +14,25 @@
 #include "net/base/net_errors.h"
 #include "net/http/http_response_headers.h"
 
+namespace {
+
+class StringData final : public content::RequestPeer::ReceivedData {
+ public:
+  explicit StringData(const std::string& data) : data_(data) {}
+  void Append(const char* data, int length) { data_.append(data, length); }
+
+  const char* payload() const override { return data_.data(); }
+  int length() const override { return data_.size(); }
+  int encoded_length() const override { return -1; }
+
+ private:
+  std::string data_;
+
+  DISALLOW_COPY_AND_ASSIGN(StringData);
+};
+
+}  // namespace
+
 ExtensionLocalizationPeer::ExtensionLocalizationPeer(
     content::RequestPeer* peer,
     IPC::Sender* message_sender,
@@ -57,10 +76,8 @@ void ExtensionLocalizationPeer::OnReceivedResponse(
   response_info_ = info;
 }
 
-void ExtensionLocalizationPeer::OnReceivedData(const char* data,
-                                               int data_length,
-                                               int encoded_data_length) {
-  data_.append(data, data_length);
+void ExtensionLocalizationPeer::OnReceivedData(scoped_ptr<ReceivedData> data) {
+  data_.append(data->payload(), data->length());
 }
 
 void ExtensionLocalizationPeer::OnCompletedRequest(
@@ -88,9 +105,7 @@ void ExtensionLocalizationPeer::OnCompletedRequest(
 
   original_peer_->OnReceivedResponse(response_info_);
   if (!data_.empty())
-    original_peer_->OnReceivedData(data_.data(),
-                                   static_cast<int>(data_.size()),
-                                   -1);
+    original_peer_->OnReceivedData(make_scoped_ptr(new StringData(data_)));
   original_peer_->OnCompletedRequest(error_code, was_ignored_by_handler,
                                      stale_copy_in_cache,
                                      security_info, completion_time,