Implement <webview>.addContentScript/removeContentScript API [2]

extensions/browser/guest_view/web_view/web_ui/web_ui_url_fetcher_group.cc

Index: extensions/browser/guest_view/web_view/web_ui/web_ui_url_fetcher_group.cc
diff --git a/extensions/browser/guest_view/web_view/web_ui/web_ui_url_fetcher_group.cc b/extensions/browser/guest_view/web_view/web_ui/web_ui_url_fetcher_group.cc
new file mode 100644
index 0000000000000000000000000000000000000000..9431582fe4a9cd659f4868219d6606bda288f371
--- /dev/null
+++ b/extensions/browser/guest_view/web_view/web_ui/web_ui_url_fetcher_group.cc
@@ -0,0 +1,51 @@
+// 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 "base/strings/string_util.h"
+#include "extensions/browser/guest_view/web_view/web_ui/web_ui_url_fetcher_group.h"
+
+WebUIURLFetcherGroup::WebUIURLFetcherGroup(content::BrowserContext* context,
+                                           const base::Closure& callback)
+    : context_(context), complete_fetchers_(0), callback_(callback) {
+}
+
+WebUIURLFetcherGroup::~WebUIURLFetcherGroup() {
+  if (!callback_.is_null()) {
+    callback_.Run();
+    callback_.Reset();
+  }
+}
+
+void WebUIURLFetcherGroup::Start(
+    std::set<extensions::UserScript::File*> file_set,
+    int render_process_id,
+    int render_view_id) {
+  for (extensions::UserScript::File* file : file_set) {
+    scoped_ptr<WebUIURLFetcher> fetcher(new WebUIURLFetcher(
+        context_, base::Bind(&WebUIURLFetcherGroup::OnWebUIURLFetchComplete,
+                             this, file)));
+    fetcher->Start(render_process_id, render_view_id, file->url());
+    fetchers_.push_back(fetcher.release());
+  }
+}
+
+void WebUIURLFetcherGroup::OnWebUIURLFetchComplete(
+    extensions::UserScript::File* script_file,
+    bool success,
+    const std::string& data) {
+  if (success) {
+    // Remove BOM from the content.
+    std::string::size_type index = data.find(base::kUtf8ByteOrderMark);
+    if (index == 0)
+      script_file->set_content(data.substr(strlen(base::kUtf8ByteOrderMark)));
+    else
+      script_file->set_content(data);
+  }
+
+  ++complete_fetchers_;
+  if (complete_fetchers_ == fetchers_.size()) {
+    callback_.Run();
+    callback_.Reset();
+  }
+}