Refactor renderer-side script injection

extensions/renderer/programmatic_script_injection.h

Index: extensions/renderer/programmatic_script_injection.h
diff --git a/extensions/renderer/programmatic_script_injection.h b/extensions/renderer/programmatic_script_injection.h
new file mode 100644
index 0000000000000000000000000000000000000000..d1c43a7c6fdcc2ebbbe70d2cb81b464df0a997ce
--- /dev/null
+++ b/extensions/renderer/programmatic_script_injection.h
@@ -0,0 +1,57 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef EXTENSIONS_RENDERER_PROGRAMMATIC_SCRIPT_INJECTION_H_
+#define EXTENSIONS_RENDERER_PROGRAMMATIC_SCRIPT_INJECTION_H_
+
+#include "base/macros.h"
+#include "extensions/renderer/script_injection.h"
+
+class GURL;
+struct ExtensionMsg_ExecuteCode_Params;
+
+namespace blink {
+class WebFrame;
+}
+
+namespace content {
+class RenderView;
+}
+
+namespace extensions {
+class Extension;
+
+// A ScriptInjection to handle tabs.executeScript().
+class ProgrammaticScriptInjection : public ScriptInjection {
+ public:
+  ProgrammaticScriptInjection(blink::WebFrame* web_frame,
+                              const ExtensionMsg_ExecuteCode_Params& params,
+                              int tab_id);
+  virtual ~ProgrammaticScriptInjection();
+
+ private:
+  // Returns the associated RenderView.
+  content::RenderView* GetRenderView();
+
+  // Returns true if the script can execute on the given |frame|.
+  // |top_url| is passed in for efficiency when this is used in a loop.
+  bool CanExecuteOnFrame(const Extension* extension,
+                         const blink::WebFrame* frame,
+                         const GURL& top_url) const;
+
+  // ScriptInjection implementation.
+  virtual void ExtensionNotFound() OVERRIDE;
+  virtual bool Allowed(const Extension* extension) OVERRIDE;
+  virtual void Inject(ScriptsRunInfo* scripts_run_info,
+                      const Extension* extension) OVERRIDE;
+
+  // The parameters for injecting the script.
+  scoped_ptr<ExtensionMsg_ExecuteCode_Params> params_;
+
+  DISALLOW_COPY_AND_ASSIGN(ProgrammaticScriptInjection);
+};
+
+}  // namespace extensions
+
+#endif  // EXTENSIONS_RENDERER_PROGRAMMATIC_SCRIPT_INJECTION_H_