Update to Chromium version 82.0.4085.0 (#749737)

- Building on macOS now requires the 10.15 SDK. Xcode 11.3 is recommended as
  Xcode 11.4 is not currently supported (see https://crbug.com/1065146).
- Jumbo build configuration is no longer supported.

Chromium is skipping the M82 release and consequently no CEF 4085 branch will
be created. For details on the Chromium decision see
https://groups.google.com/a/chromium.org/d/msg/chromium-dev/Vn7uzglqLz0/JItlSrZxBAAJ

patch/patches/gn_config.patch

@@ -1,8 +1,8 @@
 diff --git .gn .gn
-index 1bd5722a6ca5..c8919a7b4ab2 100644
+index 7ad6b3bc6298..6dc25b644f2b 100644
 --- .gn
 +++ .gn
-@@ -647,6 +647,8 @@ exec_script_whitelist =
+@@ -643,6 +643,8 @@ exec_script_whitelist =
  
        "//chrome/android/webapk/shell_apk/prepare_upload_dir/BUILD.gn",
  
@@ -12,10 +12,10 @@ index 1bd5722a6ca5..c8919a7b4ab2 100644
        # https://crbug.com/474506.
        "//clank/java/BUILD.gn",
 diff --git BUILD.gn BUILD.gn
-index d4c2158d938c..b58ce91305fe 100644
+index 6791cf2464d3..a00f33f5987f 100644
 --- BUILD.gn
 +++ BUILD.gn
-@@ -219,6 +219,7 @@ group("gn_all") {
+@@ -222,6 +222,7 @@ group("gn_all") {
  
    if (!is_ios && !is_fuchsia) {
      deps += [
@@ -56,10 +56,10 @@ index 982fbe8d3f0d..e757be4688f1 100644
 +         "studio path")
  }
 diff --git chrome/chrome_paks.gni chrome/chrome_paks.gni
-index 5121fa721a06..b5ab128722f0 100644
+index ddfc4bd551d1..0e9157969deb 100644
 --- chrome/chrome_paks.gni
 +++ chrome/chrome_paks.gni
-@@ -291,7 +291,7 @@ template("chrome_paks") {
+@@ -297,7 +297,7 @@ template("chrome_paks") {
      }
  
      input_locales = locales
@@ -69,7 +69,7 @@ index 5121fa721a06..b5ab128722f0 100644
      if (is_mac) {
        output_locales = locales_as_mac_outputs
 diff --git chrome/installer/mini_installer/BUILD.gn chrome/installer/mini_installer/BUILD.gn
-index 7d835183ab85..b8553902c1a9 100644
+index b2c99d4721dd..c8f870fa4a06 100644
 --- chrome/installer/mini_installer/BUILD.gn
 +++ chrome/installer/mini_installer/BUILD.gn
 @@ -134,7 +134,7 @@ template("generate_mini_installer") {