Temporarly disable -Wextra-semi from Chromecast internal builds

Bug: 942554, b/128676819
Test: CQ
Change-Id: I7e865898300c0dc612f619aa91024ec82caf6dd9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1524980
Commit-Queue: Kevin Schoedel <kpschoedel@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#641613}

build/config/compiler/BUILD.gn

@@ -1580,13 +1580,18 @@ config("chromium_code") {
 
     # TODO(thakis): Enable this for more platforms, https://crbug.com/926235
     # ChromeOS: http://crbug.com/940863
+    # Chromecast: http://crbug.com/942554
     has_dchecks = is_debug || dcheck_always_on
     if (!has_dchecks && is_ios) {
       # clang currently doesn't support static_assert()s in Obj-C classes,
       # https://crbug.com/936856
       cflags_c = [ "-Wextra-semi" ]
       cflags_cc = [ "-Wextra-semi" ]
-    } else if (has_dchecks || !is_chrome_branded || !is_chromeos) {
+    } else if (!has_dchecks && is_chromeos && is_chrome_branded) {
+      # Temporarily disable -Wextra-semi for Chrome on Chrome OS.
+    } else if (is_chromecast && chromecast_branding != "public") {
+      # Temporarily disable -Wextra-semi for Chromecast.
+    } else {
       cflags += [ "-Wextra-semi" ]
     }
   }