Make UserScript non-copyable.

extensions/renderer/user_script_injector.cc

 // Copyright 2014 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 "extensions/renderer/user_script_injector.h"
 
 #include <tuple>
 #include <vector>
 
 #include "base/lazy_instance.h"
@@ skipping 83 matching lines @@
       is_declarative_(is_declarative),
       user_script_set_observer_(this) {
   user_script_set_observer_.Add(script_list);
 }
 
 UserScriptInjector::~UserScriptInjector() {
 }
 
 void UserScriptInjector::OnUserScriptsUpdated(
     const std::set<HostID>& changed_hosts,
-    const std::vector<std::unique_ptr<UserScript>>& scripts) {
+    const UserScriptList& scripts) {
   // If the host causing this injection changed, then this injection
   // will be removed, and there's no guarantee the backing script still exists.
   if (changed_hosts.count(host_id_) > 0) {
     script_ = nullptr;
     return;
   }
 
   for (const std::unique_ptr<UserScript>& script : scripts) {
     // We need to compare to |script_id_| (and not to script_->id()) because the
     // old |script_| may be deleted by now.
@@ skipping 82 matching lines @@
 std::vector<blink::WebScriptSource> UserScriptInjector::GetJsSources(
     UserScript::RunLocation run_location) const {
   std::vector<blink::WebScriptSource> sources;
   if (!script_)
     return sources;
 
   DCHECK_EQ(script_->run_location(), run_location);
 
   const UserScript::FileList& js_scripts = script_->js_scripts();
   sources.reserve(js_scripts.size());
-  for (UserScript::FileList::const_iterator iter = js_scripts.begin();
-       iter != js_scripts.end();
-       ++iter) {
-    base::StringPiece script_content = iter->GetContent();
+  for (const std::unique_ptr<UserScript::File>& file : js_scripts) {
+    base::StringPiece script_content = file->GetContent();
     blink::WebString source;
     if (script_->emulate_greasemonkey()) {
       // We add this dumb function wrapper for user scripts to emulate what
       // Greasemonkey does. |script_content| becomes:
       // concat(kUserScriptHead, script_content, kUserScriptTail).
       std::string content;
       content.reserve(strlen(kUserScriptHead) + script_content.length() +
                       strlen(kUserScriptTail));
       content.append(kUserScriptHead);
       script_content.AppendToString(&content);
       content.append(kUserScriptTail);
       // TODO(lazyboy): |content| is copied to |source|, should be avoided.
       // Investigate if we can leverage WebString's cheap copying mechanism
       // somehow.
       source = blink::WebString::fromUTF8(content);
     } else {
       source = blink::WebString::fromUTF8(script_content.data(),
                                           script_content.length());
     }
-    sources.push_back(blink::WebScriptSource(source, iter->url()));
+    sources.push_back(blink::WebScriptSource(source, file->url()));
   }
 
   // Emulate Greasemonkey API for scripts that were converted to extension
   // user scripts.
   if (script_->emulate_greasemonkey())
     sources.insert(sources.begin(), g_greasemonkey_api.Get().GetSource());
 
   return sources;
 }
 
 std::vector<blink::WebString> UserScriptInjector::GetCssSources(
     UserScript::RunLocation run_location) const {
   DCHECK_EQ(UserScript::DOCUMENT_START, run_location);
 
   std::vector<blink::WebString> sources;
   if (!script_)
     return sources;
 
   const UserScript::FileList& css_scripts = script_->css_scripts();
   sources.reserve(css_scripts.size());
-  for (UserScript::FileList::const_iterator iter = css_scripts.begin();
-       iter != css_scripts.end();
-       ++iter) {
-    base::StringPiece css_content = iter->GetContent();
+  for (const std::unique_ptr<UserScript::File>& file : script_->css_scripts()) {
+    // TODO(lazyboy): |css_content| string is copied into blink::WebString for
+    // every frame in the current renderer process. Avoid the copy, possibly by
+    // only performing the copy once.
+    base::StringPiece css_content = file->GetContent();
     sources.push_back(
         blink::WebString::fromUTF8(css_content.data(), css_content.length()));
   }
   return sources;
 }
 
 void UserScriptInjector::GetRunInfo(
     ScriptsRunInfo* scripts_run_info,
     UserScript::RunLocation run_location) const {
   if (!script_)
     return;
 
   if (ShouldInjectJs(run_location)) {
     const UserScript::FileList& js_scripts = script_->js_scripts();
     scripts_run_info->num_js += js_scripts.size();
-    for (UserScript::FileList::const_iterator iter = js_scripts.begin();
-         iter != js_scripts.end();
-         ++iter) {
+    for (const std::unique_ptr<UserScript::File>& iter : js_scripts) {
       scripts_run_info->executing_scripts[host_id_.id()].insert(
           iter->url().path());
     }
   }
 
   if (ShouldInjectCss(run_location))
     scripts_run_info->num_css += script_->css_scripts().size();
 }
 
 void UserScriptInjector::OnInjectionComplete(
     std::unique_ptr<base::Value> execution_result,
     UserScript::RunLocation run_location,
     content::RenderFrame* render_frame) {}
 
 void UserScriptInjector::OnWillNotInject(InjectFailureReason reason,
                                          content::RenderFrame* render_frame) {
 }
 
 }  // namespace extensions