Make UserScript non-copyable.

extensions/renderer/user_script_injector.cc

Index: extensions/renderer/user_script_injector.cc
diff --git a/extensions/renderer/user_script_injector.cc b/extensions/renderer/user_script_injector.cc
index 21a59eac30fa4bd3e03c928090db5f13e6189ed9..9783859734f7b929757031f0c2be5772b93a83c8 100644
--- a/extensions/renderer/user_script_injector.cc
+++ b/extensions/renderer/user_script_injector.cc
@@ -101,7 +101,7 @@ 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) {
@@ -202,13 +202,11 @@ std::vector<blink::WebScriptSource> UserScriptInjector::GetJsSources(
 
   DCHECK_EQ(script_->run_location(), run_location);
 
-  const UserScript::FileList& js_scripts = script_->js_scripts();
-
-  for (UserScript::FileList::const_iterator iter = js_scripts.begin();
-       iter != js_scripts.end();
-       ++iter) {
-    std::string content = iter->GetContent().as_string();
-
+  for (const std::unique_ptr<UserScript::File>& file : script_->js_scripts()) {
+    // TODO(lazyboy): Script contents are copied twice here! We could explore
+    // leveraging WebString-s refcounting, which might be hard. At the very
+    // least, we should make single copy for non-greasemonkey case.
+    std::string content = file->GetContent().as_string();
     // We add this dumb function wrapper for user scripts to emulate what
     // Greasemonkey does.
     if (script_->emulate_greasemonkey()) {
@@ -216,7 +214,7 @@ std::vector<blink::WebScriptSource> UserScriptInjector::GetJsSources(
       content += kUserScriptTail;
     }
     sources.push_back(blink::WebScriptSource(
-        blink::WebString::fromUTF8(content), iter->url()));
+        blink::WebString::fromUTF8(content), file->url()));
   }
 
   // Emulate Greasemonkey API for scripts that were converted to extension
@@ -235,11 +233,12 @@ std::vector<std::string> UserScriptInjector::GetCssSources(
   if (!script_)
     return sources;
 
-  const UserScript::FileList& css_scripts = script_->css_scripts();
-  for (UserScript::FileList::const_iterator iter = css_scripts.begin();
-       iter != css_scripts.end();
-       ++iter) {
-    sources.push_back(iter->GetContent().as_string());
+  for (const std::unique_ptr<UserScript::File>& file : script_->css_scripts()) {
+    // TODO(lazyboy): This is a StringPiece -> std::string copy, and then it
+    // gets copied into a WebString where GetCssSources() is used :( Getting
+    // rid of first copy should be trivial and we should also try to get rid of
+    // the second copy.
+    sources.push_back(file->GetContent().as_string());
   }
   return sources;
 }
@@ -253,9 +252,7 @@ void UserScriptInjector::GetRunInfo(
   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());
     }