Make tab capture media stream requests verify that the request came from extension API

chrome/browser/extensions/extension_host.cc

Index: chrome/browser/extensions/extension_host.cc
diff --git a/chrome/browser/extensions/extension_host.cc b/chrome/browser/extensions/extension_host.cc
index d370c268c555b51ae652538ac323cac0c26de36b..5a7a7ebef335df636c2e8405a1c0ce8150db047c 100644
--- a/chrome/browser/extensions/extension_host.cc
+++ b/chrome/browser/extensions/extension_host.cc
@@ -35,6 +35,8 @@
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "chrome/common/extensions/extension_messages.h"
+#include "chrome/common/extensions/feature_switch.h"
+#include "chrome/common/extensions/request_media_access_permission_helper.h"
 #include "chrome/common/render_messages.h"
 #include "chrome/common/url_constants.h"
 #include "content/public/browser/content_browser_client.h"
@@ -640,4 +642,18 @@ void ExtensionHost::RenderViewReady() {
       content::Details<ExtensionHost>(this));
 }
 
+void ExtensionHost::RequestMediaAccessPermission(
+    content::WebContents* web_contents,
+    const content::MediaStreamRequest* request,
+    const content::MediaResponseCallback& callback) {
+  // For tab capture device, we require the tabCapture permission.
+  RequestMediaAccessPermissionHelper::AuthorizeRequest(
+      request,
+      callback,
+      false,
+      false,
+      FeatureSwitch::tab_capture()->IsEnabled() &&
+      extension()->HasAPIPermission(APIPermission::kTabCapture));
+}
+
 }  // namespace extensions