chore: bump chromium to 121.0.6147.0 (main) (#40523)

* chore: bump chromium in DEPS to 121.0.6128.0

* build: update patches

* refactor: remove instrumentation from extensions code

Ref: 5002404

* refactor: modernization of tabs_api

Ref: 4997031

* fix: add RecordHover and RecordDrag handlers

* build: add missing pdf files

* chore: bump chromium in DEPS to 121.0.6129.0

* chore: bump chromium in DEPS to 121.0.6131.0

* chore: update patches

* refactor: remove will_cause_resize from ExitFullscreen

Ref: 5031312

* chore: add missing std converter include

Before these were being inferred as std::string implicitly, not anymore
Ref: 5029573

* chore: Unwrap UserScriptList from unique_ptrs

Ref: 5005198

* refactor: add PDF internal id into PDF stream info

Ref: 4876972

* refactor: add metadata to view classes

Ref: 4994885

* chore: run lint --fix

* chore: update libc++ filenames

* chore: clean up menubar

* chore: update patches after main merge

* 5010979: Replace base::WStringPiece usage with std::wstring_view | 5010979

* chore: bump chromium in DEPS to 121.0.6142.0

* chore: update patches

* 4969574: Refactor NativeDesktopMediaList | 4969574

* 5031192: [blink] Create new blink test suite that doesn't create blink Isolate | 5031192

* chore: update v8/devtools patches

* 5040722: [base] Replace MakeFixedFlatTreeSorted with tag type overloads | 5040722

* 5026474: Add --generate-pdf-document-outline | 5026474

* 5024297: Change parameter of CheckMediaAccessPermission from GURL to URL::Origin | 5024297

* 5034217: [RWS] Remove CanonicalCookie::IsSameParty method | 5034217

* 5037192: Rewrite usage of RenderFrame::GetRoutingID | 5037192

* 5041802: Reland "Incorporate policy override for OOPPD feature" | 5041802

* chore: bump chromium in DEPS to 121.0.6143.0

* chore: bump chromium in DEPS to 121.0.6145.0

* chore: update chromium patches

* 5049986: Use std::unique_ptr for MenuItemView::submenu_ member. | 5049986

* 5041595: picture-in-picture: Add PictureInPictureOcclusionTracker | 5041595

* chore: update all patches

* chore: bump chromium in DEPS to 121.0.6147.0

* chore: update patches

* 5051069: Use base::FunctionRef for BrowserPluginGuestManager. | 5051069

* 5057330: [base] Remove base::Erase()/base::EraseIf() overloads for std::set | 5057330

* fixup! 5041802: Reland "Incorporate policy override for OOPPD feature" | 5041802

* 5017518: Remove PPAPI if NaCl is disabled | 5017518

* 5002232: [DevTools] Console Insights: move from build flag to Feature API | 5002232

* 4970322: [X11] Move utils into x11::Connection | 4970322

* 5048950: Let MenuModelAdapter::CreateMenu return a std::unique_ptr<>. | 5048950

* chore: update libcxx filenames

* use Context::Scope in RunScriptsAtDocument{Start,End}

* 4775128: content: Reuse CC instance for main frame navigations

4775128

* also wrap WebWorkerObserver::ContextWillDestroy with Context::Scope

* set LIBCPP_HARDENING_MODE

5014271

---------

Co-authored-by: electron-roller[bot] <84116207+electron-roller[bot]@users.noreply.github.com>
Co-authored-by: Samuel Attard <marshallofsound@electronjs.org>
Co-authored-by: Keeley Hammond <vertedinde@electronjs.org>
Co-authored-by: VerteDinde <keeleymhammond@gmail.com>
Co-authored-by: PatchUp <73610968+patchup[bot]@users.noreply.github.com>
Co-authored-by: Jeremy Rose <jeremya@chromium.org>

patches/chromium/support_mixed_sandbox_with_zygote.patch

@@ -22,7 +22,7 @@ However, the patch would need to be reviewed by the security team, as it
 does touch a security-sensitive class.
 
 diff --git a/content/browser/renderer_host/render_process_host_impl.cc b/content/browser/renderer_host/render_process_host_impl.cc
-index 5bb3378497e8036d8170f951e191c6331a996826..716c206e5c758c0dec8355e126845d06c91178f9 100644
+index bc0044eee2bd351f5c5ada89cd4b859a79dce619..8e7cca5026c165c06687210b3206eac21e70e89c 100644
 --- a/content/browser/renderer_host/render_process_host_impl.cc
 +++ b/content/browser/renderer_host/render_process_host_impl.cc
 @@ -1712,9 +1712,15 @@ bool RenderProcessHostImpl::Init() {