Use in-class initializers for base::WeakPtrFactory in content/.

Generated by: https://chromium-review.googlesource.com/c/chromium/src/+/1689216

Bug: 981415
Change-Id: I363f81e8c17cabfb6031666ca0846bcfcbf97b78
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1693602
Commit-Queue: Matt Falkenhagen <[email protected]>
Reviewed-by: Matt Falkenhagen <[email protected]>
Cr-Commit-Position: refs/heads/master@{#676281}
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index 4f1cac5..702a9c4c 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -610,9 +610,7 @@
       showing_context_menu_(false),
       text_autosizer_page_info_({0, 0, 1.f}),
       native_theme_observer_(this),
-      had_inner_webcontents_(false),
-      loading_weak_factory_(this),
-      weak_factory_(this) {
+      had_inner_webcontents_(false) {
   frame_tree_.SetFrameRemoveListener(
       base::Bind(&WebContentsImpl::OnFrameRemoved,
                  base::Unretained(this)));