fix: enable back a DCHECK in viz::ServerSharedBitmapManager

Fixes #14327.
Backports https://chromium-review.googlesource.com/802574.

patches/common/chromium/.patches.yaml

@@ -45,7 +45,6 @@ patches:
       base/memory/weak_ptr.cc
       base/process/kill_win.cc
       components/viz/service/display/program_binding.h
-      components/viz/service/display_embedder/server_shared_bitmap_manager.cc
       content/browser/frame_host/navigation_controller_impl.cc
       content/browser/frame_host/render_frame_host_impl.cc
       content/browser/renderer_host/render_widget_host_view_mac.mm
@@ -481,3 +480,13 @@ patches:
   description: |
     Expose URLRequestContextGetter::{Add,Remove}Observer.
     This patch should be removed once we switch to using the net service (cc @robo)
+-
+  author: Aleksei Kuzmin <alkuzmin@microsoft.com>
+  file: backport_7167a9eac.patch
+  description: |
+    "viz: Remove the global ServerSharedBitmapManager."
+    https://chromium-review.googlesource.com/802574
+    Landed in 69.0.3447.0.
+    See https://github.com/electron/electron/issues/14327
+    (Android specific changes and changes in some test files
+    have been removed from the diff.)

patches/common/chromium/dcheck.patch

@@ -79,21 +79,6 @@ index 8b28c57f854e..a0e7056af23f 100644
        return;
      }
  
-diff --git a/components/viz/service/display_embedder/server_shared_bitmap_manager.cc b/components/viz/service/display_embedder/server_shared_bitmap_manager.cc
-index 9d84f91109a3..5e252917bc0f 100644
---- a/components/viz/service/display_embedder/server_shared_bitmap_manager.cc
-+++ b/components/viz/service/display_embedder/server_shared_bitmap_manager.cc
-@@ -63,7 +63,9 @@ base::LazyInstance<ServerSharedBitmapManager>::DestructorAtExit
- ServerSharedBitmapManager::ServerSharedBitmapManager() = default;
- 
- ServerSharedBitmapManager::~ServerSharedBitmapManager() {
--  DCHECK(handle_map_.empty());
-+  // FIXME(alexeykuzmin): Gets constantly triggered on Windows CI.
-+  // Backporting https://chromium-review.googlesource.com/802574 should help.
-+  // DCHECK(handle_map_.empty());
- }
- 
- ServerSharedBitmapManager* ServerSharedBitmapManager::current() {
 diff --git a/content/browser/frame_host/navigation_controller_impl.cc b/content/browser/frame_host/navigation_controller_impl.cc
 index 74ff6b4286c2..02bf1c55d86f 100644
 --- a/content/browser/frame_host/navigation_controller_impl.cc