Switch Extensions::TabHelper to use WebContents, WebContentsUserData.

chrome/browser/extensions/api/tabs/execute_code_in_tab_function.cc

Index: chrome/browser/extensions/api/tabs/execute_code_in_tab_function.cc
diff --git a/chrome/browser/extensions/api/tabs/execute_code_in_tab_function.cc b/chrome/browser/extensions/api/tabs/execute_code_in_tab_function.cc
index 43da953b1aaeeda60c7143fd50b6d8848fb02cfc..5b766132e7a977f3afde49ea25040a6d1874986c 100644
--- a/chrome/browser/extensions/api/tabs/execute_code_in_tab_function.cc
+++ b/chrome/browser/extensions/api/tabs/execute_code_in_tab_function.cc
@@ -265,13 +265,14 @@ bool ExecuteCodeInTabFunction::Execute(const std::string& code_string) {
   }
   CHECK_NE(UserScript::UNDEFINED, run_at);
 
-  contents->extension_tab_helper()->script_executor()->ExecuteScript(
-      extension->id(),
-      script_type,
-      code_string,
-      frame_scope,
-      run_at,
-      ScriptExecutor::ISOLATED_WORLD,
-      base::Bind(&ExecuteCodeInTabFunction::OnExecuteCodeFinished, this));
+  extensions::TabHelper::FromWebContents(contents->web_contents())->
+      script_executor()->ExecuteScript(
+          extension->id(),
+          script_type,
+          code_string,
+          frame_scope,
+          run_at,
+          ScriptExecutor::ISOLATED_WORLD,
+          base::Bind(&ExecuteCodeInTabFunction::OnExecuteCodeFinished, this));
   return true;
 }