Implement <webview>.addContentScript/removeContentScript API [1]

extensions/browser/api/guest_view/web_view/web_view_internal_api.h

Index: extensions/browser/api/guest_view/web_view/web_view_internal_api.h
diff --git a/extensions/browser/api/guest_view/web_view/web_view_internal_api.h b/extensions/browser/api/guest_view/web_view/web_view_internal_api.h
index 650d530bcb553a97d6476493be03716babc6502b..abe4bff56e7a908a0b94c6de86597dcc71bd21d7 100644
--- a/extensions/browser/api/guest_view/web_view/web_view_internal_api.h
+++ b/extensions/browser/api/guest_view/web_view/web_view_internal_api.h
@@ -129,6 +129,40 @@ class WebViewInternalInsertCSSFunction
   DISALLOW_COPY_AND_ASSIGN(WebViewInternalInsertCSSFunction);
 };
 
+class WebViewInternalAddContentScriptsFunction
+    : public UIThreadExtensionFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION("webViewInternal.addContentScripts",
+                             WEBVIEWINTERNAL_ADDCONTENTSCRIPTS);
+
+  WebViewInternalAddContentScriptsFunction();
+
+ protected:
+  ~WebViewInternalAddContentScriptsFunction() override;
+
+ private:
+  ExecuteCodeFunction::ResponseAction Run() final;
+
+  DISALLOW_COPY_AND_ASSIGN(WebViewInternalAddContentScriptsFunction);
+};
+
+class WebViewInternalRemoveContentScriptsFunction
+    : public UIThreadExtensionFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION("webViewInternal.removeContentScripts",
+                             WEBVIEWINTERNAL_REMOVECONTENTSCRIPTS);
+
+  WebViewInternalRemoveContentScriptsFunction();
+
+ protected:
+  ~WebViewInternalRemoveContentScriptsFunction() override;
+
+ private:
+  ExecuteCodeFunction::ResponseAction Run() final;
+
+  DISALLOW_COPY_AND_ASSIGN(WebViewInternalRemoveContentScriptsFunction);
+};
+
 class WebViewInternalSetNameFunction : public WebViewInternalExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("webViewInternal.setName",