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 37483df9e0a1c09c9b74057999f9cb005b590faa..39697f97b6763b11b8d3420d2bfd479dd16482f4 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
@@ -115,6 +115,48 @@ class WebViewInternalInsertCSSFunction
   DISALLOW_COPY_AND_ASSIGN(WebViewInternalInsertCSSFunction);
 };
 
+class WebViewInternalAddContentScriptsFunction : public AsyncExtensionFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION("webViewInternal.addContentScripts",
+                             WEBVIEWINTERNAL_ADDCONTENTSCRIPTS);
+
+  WebViewInternalAddContentScriptsFunction();
+
+  const HostID& host_id() const { return host_id_; }
+  void set_host_id(HostID host_id) { host_id_ = host_id; }
+
+ protected:
+  ~WebViewInternalAddContentScriptsFunction() override;
+
+ private:
+  bool RunAsync() override;
+
+  // The ID of the injection host.
+  HostID host_id_;
+
+  // The instance ID of the <*view> element.
+  int guest_view_instance_id_;
+
+  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",