Prevent duplicate content script injection defined in manifest.json (reland)

extensions/renderer/user_script_injector.h

Index: extensions/renderer/user_script_injector.h
diff --git a/extensions/renderer/user_script_injector.h b/extensions/renderer/user_script_injector.h
index 91716559c3a7f27ba44b1afda3f7abf114fd2691..7d800f49de1c3275712855ea014ee72bf93ff6ef 100644
--- a/extensions/renderer/user_script_injector.h
+++ b/extensions/renderer/user_script_injector.h
@@ -41,16 +41,22 @@ class UserScriptInjector : public ScriptInjector,
   bool ShouldExecuteInMainWorld() const override;
   bool IsUserGesture() const override;
   bool ExpectsResults() const override;
-  bool ShouldInjectJs(UserScript::RunLocation run_location) const override;
-  bool ShouldInjectCss(UserScript::RunLocation run_location) const override;
+  bool ShouldInjectScripts(const UserScript::FileList& scripts,
+                           const std::set<GURL>& injected_scripts) const;
+  bool ShouldInjectJs(UserScript::RunLocation run_location,
+                      const std::set<GURL>& injected_scripts) const override;
+  bool ShouldInjectCss(UserScript::RunLocation run_location,
+                       const std::set<GURL>& injected_scripts) const override;
   PermissionsData::AccessType CanExecuteOnFrame(
       const InjectionHost* injection_host,
       blink::WebLocalFrame* web_frame,
       int tab_id) const override;
   std::vector<blink::WebScriptSource> GetJsSources(
-      UserScript::RunLocation run_location) const override;
+      UserScript::RunLocation run_location,
+      ScriptsRunInfo* scripts_run_info) const override;
   std::vector<blink::WebString> GetCssSources(
-      UserScript::RunLocation run_location) const override;
+      UserScript::RunLocation run_location,
+      ScriptsRunInfo* scripts_run_info) const override;
   void GetRunInfo(ScriptsRunInfo* scripts_run_info,
                   UserScript::RunLocation run_location) const override;
   void OnInjectionComplete(std::unique_ptr<base::Value> execution_result,