Remove the mostly-unused FilterPolicy class. Convert the only actually-used bit, FILTER_EXTENSION_MESSAGES, into a bool that's only passed to places that really need it.

Also renames ExtensionMessageFilterPeer to ExtensionLocalizationPeer in hopes of making its one use more apparent.  I added a couple comments too.

BUG=none
TEST=none
Review URL: http://codereview.chromium.org/2105006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@47533 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 123 insertions, 0 deletions

diff --git a/chrome/common/extensions/extension_localization_peer.cc b/chrome/common/extensions/extension_localization_peer.cc
new file mode 100644
index 0000000..36e44ce
--- /dev/null
+++ b/chrome/common/extensions/extension_localization_peer.cc
@@ -0,0 +1,123 @@
+// Copyright (c) 2010 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 "chrome/common/extensions/extension_localization_peer.h"
+
+#include "app/l10n_util.h"
+#include "base/string_util.h"
+#include "chrome/common/extensions/extension_message_bundle.h"
+#include "chrome/common/render_messages.h"
+#include "chrome/common/url_constants.h"
+#include "grit/generated_resources.h"
+#include "grit/renderer_resources.h"
+#include "net/base/net_errors.h"
+#include "net/http/http_response_headers.h"
+#include "webkit/glue/webkit_glue.h"
+
+ExtensionLocalizationPeer::ExtensionLocalizationPeer(
+    webkit_glue::ResourceLoaderBridge::Peer* peer,
+    IPC::Message::Sender* message_sender,
+    const GURL& request_url)
+    : original_peer_(peer),
+      message_sender_(message_sender),
+      request_url_(request_url) {
+}
+
+ExtensionLocalizationPeer::~ExtensionLocalizationPeer() {
+}
+
+// static
+ExtensionLocalizationPeer*
+ExtensionLocalizationPeer::CreateExtensionLocalizationPeer(
+    webkit_glue::ResourceLoaderBridge::Peer* peer,
+    IPC::Message::Sender* message_sender,
+    const std::string& mime_type,
+    const GURL& request_url) {
+  // Return NULL if content is not text/css or it doesn't belong to extension
+  // scheme.
+  return (request_url.SchemeIs(chrome::kExtensionScheme) &&
+          StartsWithASCII(mime_type, "text/css", false)) ?
+      new ExtensionLocalizationPeer(peer, message_sender, request_url) : NULL;
+}
+
+void ExtensionLocalizationPeer::OnUploadProgress(
+    uint64 position, uint64 size) {
+  NOTREACHED();
+}
+
+bool ExtensionLocalizationPeer::OnReceivedRedirect(
+    const GURL& new_url,
+    const webkit_glue::ResourceLoaderBridge::ResponseInfo& info,
+    bool* has_new_first_party_for_cookies,
+    GURL* new_first_party_for_cookies) {
+  NOTREACHED();
+  return false;
+}
+
+void ExtensionLocalizationPeer::OnReceivedResponse(
+    const webkit_glue::ResourceLoaderBridge::ResponseInfo& info,
+    bool content_filtered) {
+  response_info_ = info;
+}
+
+void ExtensionLocalizationPeer::OnReceivedData(const char* data, int len) {
+  data_.append(data, len);
+}
+
+void ExtensionLocalizationPeer::OnCompletedRequest(
+    const URLRequestStatus& status, const std::string& security_info) {
+  // Make sure we delete ourselves at the end of this call.
+  scoped_ptr<ExtensionLocalizationPeer> this_deleter(this);
+
+  // Give sub-classes a chance at altering the data.
+  if (status.status() != URLRequestStatus::SUCCESS) {
+    // We failed to load the resource.
+    original_peer_->OnReceivedResponse(response_info_, true);
+    URLRequestStatus status(URLRequestStatus::CANCELED, net::ERR_ABORTED);
+    original_peer_->OnCompletedRequest(status, security_info);
+    return;
+  }
+
+  ReplaceMessages();
+
+  original_peer_->OnReceivedResponse(response_info_, true);
+  if (!data_.empty())
+    original_peer_->OnReceivedData(data_.data(),
+                                   static_cast<int>(data_.size()));
+  original_peer_->OnCompletedRequest(status, security_info);
+}
+
+GURL ExtensionLocalizationPeer::GetURLForDebugging() const {
+  return original_peer_->GetURLForDebugging();
+}
+
+void ExtensionLocalizationPeer::ReplaceMessages() {
+  if (!message_sender_ || data_.empty())
+    return;
+
+  if (!request_url_.is_valid())
+    return;
+
+  std::string extension_id = request_url_.host();
+  L10nMessagesMap* l10n_messages = GetL10nMessagesMap(extension_id);
+  if (!l10n_messages) {
+    L10nMessagesMap messages;
+    message_sender_->Send(new ViewHostMsg_GetExtensionMessageBundle(
+        extension_id, &messages));
+
+    // Save messages we got, so we don't have to ask again.
+    // Messages map is never empty, it contains at least @@extension_id value.
+    ExtensionToL10nMessagesMap& l10n_messages_map =
+        *GetExtensionToL10nMessagesMap();
+    l10n_messages_map[extension_id] = messages;
+
+    l10n_messages = GetL10nMessagesMap(extension_id);
+  }
+
+  std::string error;
+  if (ExtensionMessageBundle::ReplaceMessagesWithExternalDictionary(
+          *l10n_messages, &data_, &error)) {
+    data_.resize(data_.size());
+  }
+}