Extract executeScript-like functionality into a single ExtensionScriptExecutor class.

chrome/browser/ui/tab_contents/tab_contents_wrapper.cc

Index: chrome/browser/ui/tab_contents/tab_contents_wrapper.cc
diff --git a/chrome/browser/ui/tab_contents/tab_contents_wrapper.cc b/chrome/browser/ui/tab_contents/tab_contents_wrapper.cc
index 5e457eaf586263e332e26a40d2652d5280aa4942..c2003a834112a5a32a47f668a19967b11a757e07 100644
--- a/chrome/browser/ui/tab_contents/tab_contents_wrapper.cc
+++ b/chrome/browser/ui/tab_contents/tab_contents_wrapper.cc
@@ -12,8 +12,9 @@
 #include "chrome/browser/automation/automation_tab_helper.h"
 #include "chrome/browser/content_settings/tab_specific_content_settings.h"
 #include "chrome/browser/download/download_request_limiter_observer.h"
-#include "chrome/browser/extensions/extension_tab_helper.h"
 #include "chrome/browser/extensions/api/web_navigation/web_navigation_api.h"
+#include "chrome/browser/extensions/extension_tab_helper.h"
+#include "chrome/browser/extensions/script_executor_impl.h"
 #include "chrome/browser/external_protocol/external_protocol_observer.h"
 #include "chrome/browser/favicon/favicon_tab_helper.h"
 #include "chrome/browser/history/history_tab_helper.h"
@@ -90,6 +91,8 @@ TabContentsWrapper::TabContentsWrapper(WebContents* contents)
   constrained_window_tab_helper_.reset(new ConstrainedWindowTabHelper(this));
   core_tab_helper_.reset(new CoreTabHelper(contents));
   extension_tab_helper_.reset(new ExtensionTabHelper(this));
+  extension_script_executor_.reset(
+      new extensions::ScriptExecutorImpl(web_contents()));
   favicon_tab_helper_.reset(new FaviconTabHelper(contents));
   find_tab_helper_.reset(new FindTabHelper(contents));
   history_tab_helper_.reset(new HistoryTabHelper(contents));