Refactoring: de-couple Extensions from "script injection System" [render side] : 1

extensions/browser/script_executor.cc

Index: extensions/browser/script_executor.cc
diff --git a/extensions/browser/script_executor.cc b/extensions/browser/script_executor.cc
index ac3e671b9a48c056a0344f16c51a92ab5b2a2372..954107d7d27612af156ccbc8a9f3517bf632ebda 100644
--- a/extensions/browser/script_executor.cc
+++ b/extensions/browser/script_executor.cc
@@ -14,6 +14,7 @@
 #include "extensions/browser/extension_registry.h"
 #include "extensions/browser/script_execution_observer.h"
 #include "extensions/common/extension_messages.h"
+#include "extensions/common/host_id.h"
 #include "ipc/ipc_message.h"
 #include "ipc/ipc_message_macros.h"
 
@@ -122,6 +123,7 @@ void ScriptExecutor::ExecuteScript(const std::string& extension_id,
                                    ScriptExecutor::WorldType world_type,
                                    ScriptExecutor::ProcessType process_type,
                                    const GURL& webview_src,
+                                   int instance_id,
                                    const GURL& file_url,
                                    bool user_gesture,
                                    ScriptExecutor::ResultType result_type,
@@ -143,6 +145,9 @@ void ScriptExecutor::ExecuteScript(const std::string& extension_id,
   params.run_at = static_cast<int>(run_at);
   params.in_main_world = (world_type == MAIN_WORLD);
   params.is_web_view = (process_type == WEB_VIEW_PROCESS);
+  params.instance_id = instance_id;
+  // Only webviews should have custom instance ids.
+  DCHECK(instance_id == HostID::kDefaultInstanceId || params.is_web_view);
   params.webview_src = webview_src;
   params.file_url = file_url;
   params.wants_result = (result_type == JSON_SERIALIZED_RESULT);