Revert of Stop copying script contents for each RenderFrames.

extensions/renderer/user_script_set.cc

Index: extensions/renderer/user_script_set.cc
diff --git a/extensions/renderer/user_script_set.cc b/extensions/renderer/user_script_set.cc
index cf10081267ea271bb22687c788d792d0f94c1b9b..5fd7ab8b28a367829c37239294efccafd442d1e8 100644
--- a/extensions/renderer/user_script_set.cc
+++ b/extensions/renderer/user_script_set.cc
@@ -31,11 +31,6 @@
 
 namespace {
 
-// These two strings are injected before and after the Greasemonkey API and
-// user script to wrap it in an anonymous scope.
-const char kUserScriptHead[] = "(function (unsafeWindow) {\n";
-const char kUserScriptTail[] = "\n})(window);";
-
 GURL GetDocumentUrlForFrame(blink::WebLocalFrame* frame) {
   GURL data_source_url = ScriptContext::GetDataSourceURLForFrame(frame);
   if (!data_source_url.is_empty() && frame->isViewSourceModeEnabled()) {
@@ -118,7 +113,6 @@
   CHECK(iter.ReadUInt32(&num_scripts));
 
   scripts_.clear();
-  script_sources_.clear();
   scripts_.reserve(num_scripts);
   for (uint32_t i = 0; i < num_scripts; ++i) {
     std::unique_ptr<UserScript> script(new UserScript());
@@ -232,46 +226,4 @@
   return injection;
 }
 
-blink::WebString UserScriptSet::GetJsSource(const UserScript::File& file,
-                                            bool emulate_greasemonkey) {
-  const GURL& url = file.url();
-  std::map<GURL, blink::WebString>::iterator iter = script_sources_.find(url);
-  if (iter != script_sources_.end())
-    return iter->second;
-
-  base::StringPiece script_content = file.GetContent();
-  blink::WebString source;
-  if (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);
-    source = blink::WebString::fromUTF8(content);
-  } else {
-    source = blink::WebString::fromUTF8(script_content.data(),
-                                        script_content.length());
-  }
-  script_sources_[url] = source;
-  return source;
-}
-
-blink::WebString UserScriptSet::GetCssSource(const UserScript::File& file) {
-  const GURL& url = file.url();
-  std::map<GURL, blink::WebString>::iterator iter = script_sources_.find(url);
-  if (iter != script_sources_.end())
-    return iter->second;
-
-  base::StringPiece script_content = file.GetContent();
-  return script_sources_
-      .insert(std::make_pair(
-          url, blink::WebString::fromUTF8(script_content.data(),
-                                          script_content.length())))
-      .first->second;
-}
-
 }  // namespace extensions