GuestViews should be able to specify task manager entries

chrome/browser/guest_view/web_view/chrome_web_view_guest_delegate.cc

Index: chrome/browser/guest_view/web_view/chrome_web_view_guest_delegate.cc
diff --git a/chrome/browser/guest_view/web_view/chrome_web_view_guest_delegate.cc b/chrome/browser/guest_view/web_view/chrome_web_view_guest_delegate.cc
index 8175022edca475e6ede42075a725f5070540ffb0..269a9746bee432f18ced9996bd6d69491b5e4ce1 100644
--- a/chrome/browser/guest_view/web_view/chrome_web_view_guest_delegate.cc
+++ b/chrome/browser/guest_view/web_view/chrome_web_view_guest_delegate.cc
@@ -12,6 +12,7 @@
 #include "chrome/browser/ui/pdf/pdf_tab_helper.h"
 #include "chrome/browser/ui/zoom/zoom_controller.h"
 #include "chrome/common/chrome_version_info.h"
+#include "chrome/grit/generated_resources.h"
 #include "components/renderer_context_menu/context_menu_delegate.h"
 #include "content/public/common/page_zoom.h"
 
@@ -36,6 +37,10 @@ ChromeWebViewGuestDelegate::ChromeWebViewGuestDelegate(
 ChromeWebViewGuestDelegate::~ChromeWebViewGuestDelegate() {
 }
 
+int ChromeWebViewGuestDelegate::GetTaskPrefix() const {
+  return IDS_TASK_MANAGER_WEBVIEW_TAG_PREFIX;
+}
+
 double ChromeWebViewGuestDelegate::GetZoom() {
   return current_zoom_factor_;
 }