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 cd23be2b80efd1365739b457e5f717dcae671d1b..bfd8ee955623c60a291f2875f59beedff6e638bf 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 +129,39 @@ class WebViewInternalInsertCSSFunction
   DISALLOW_COPY_AND_ASSIGN(WebViewInternalInsertCSSFunction);
 };
 
+class WebViewInternalAddContentScriptsFunction : public AsyncExtensionFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION("webViewInternal.addContentScripts",
+                             WEBVIEWINTERNAL_ADDCONTENTSCRIPTS);
+
+  WebViewInternalAddContentScriptsFunction();
+
+ protected:
+  ~WebViewInternalAddContentScriptsFunction() override;
+
+ private:
+  bool RunAsync() override;
+
+  DISALLOW_COPY_AND_ASSIGN(WebViewInternalAddContentScriptsFunction);
+};
+
+class WebViewInternalRemoveContentScriptsFunction
+    : public AsyncExtensionFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION("webViewInternal.removeContentScripts",
+                             WEBVIEWINTERNAL_REMOVECONTENTSCRIPTS);
+
+  WebViewInternalRemoveContentScriptsFunction();
+
+ protected:
+  ~WebViewInternalRemoveContentScriptsFunction() override;
+
+ private:
+  bool RunAsync() override;
+
+  DISALLOW_COPY_AND_ASSIGN(WebViewInternalRemoveContentScriptsFunction);
+};
+
 class WebViewInternalSetNameFunction : public WebViewInternalExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("webViewInternal.setName",