docs: add Electron deps to license credits file (#35330)

* docs: add Electron deps to license credits file

* fixup! docs: add Electron deps to license credits file

remove nan; it is dev-only

* chore: update patches

Co-authored-by: Charles Kerr <charles@charleskerr.com>
Co-authored-by: Samuel Attard <samuel.r.attard@gmail.com>

patches/chromium/.patches

@@ -141,3 +141,4 @@ cherry-pick-51daffbf5cd8.patch
 cherry-pick-9b5207569882.patch
 dpwa_enable_window_controls_overlay_by_default.patch
 cherry-pick-eb4d31309df7.patch
+add_electron_deps_to_license_credits_file.patch

patches/chromium/add_electron_deps_to_license_credits_file.patch

@@ -0,0 +1,45 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Charles Kerr <charles@charleskerr.com>
+Date: Tue, 9 Aug 2022 12:35:36 -0500
+Subject: add electron deps to license credits file
+
+Ensure that licenses for the dependencies introduced by Electron
+are included in `LICENSES.chromium.html`
+
+diff --git a/tools/licenses.py b/tools/licenses.py
+index b083d3509433aa97aa85c59a4269def5ef5a5359..c032e1f9dc058ff2c76b54ac5da6805163d1eadf 100755
+--- a/tools/licenses.py
++++ b/tools/licenses.py
+@@ -340,6 +340,32 @@ SPECIAL_CASES = {
+         "License File":
+         "/third_party/swiftshader/third_party/SPIRV-Tools/LICENSE",
+     },
++
++    os.path.join('third_party', 'electron_node'): {
++        "Name": "Node.js",
++        "URL": "https://github.com/nodejs/node",
++        "License": "MIT",
++        "License File": "/third_party/electron_node/LICENSE",
++    },
++    os.path.join('third_party', 'squirrel.mac'): {
++        "Name": "Squirrel",
++        "URL": "https://github.com/Squirrel/Squirrel.Mac",
++        "License": "MIT",
++        "License File": "/third_party/squirrel.mac/LICENSE",
++    },
++    os.path.join('third_party', 'squirrel.mac', 'vendor', 'mantle'): {
++        "Name": "Mantle",
++        "URL": "https://github.com/Mantle/Mantle",
++        "License": "MIT",
++        "License File": "/third_party/squirrel.mac/vendor/mantle/LICENSE.md",
++    },
++    os.path.join('third_party', 'squirrel.mac', 'vendor', 'ReactiveObjC'): {
++        "Name": "ReactiveObjC",
++        "URL": "https://github.com/ReactiveCocoa/ReactiveObjC",
++        "License": "MIT",
++        "License File":
++        "/third_party/squirrel.mac/vendor/ReactiveObjC/LICENSE.md",
++    },
+ }
+ 
+ # Special value for 'License File' field used to indicate that the license file