Replace illegal _ with - in Widevine Resources.bundle's CFBundleIdentifier.

Tbr: dpranke@chromium.org
Bug: 484160
Change-Id: I8b63ce9b3ca95b37cd36f40ee1af619ce0a0409b
Reviewed-on: https://chromium-review.googlesource.com/763913Reviewed-by: Robert Sesek <rsesek@chromium.org>
Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Reviewed-by: Xiaohan Wang <xhwang@chromium.org>
Commit-Queue: Robert Sesek <rsesek@chromium.org>
Cr-Commit-Position: refs/heads/master@{#515992}

chrome/BUILD.gn

@@ -1037,7 +1037,7 @@ if (is_win) {
       info_plist = "//third_party/widevine/cdm/widevine_resources.plist"
       extra_substitutions = [
         "CHROMIUM_BUNDLE_ID=$chrome_mac_bundle_id",
-        "BUNDLE_ID=widevine_resources",
+        "BUNDLE_ID=widevine-resources",
       ]
       executable_name = "Widevine Resources"
     }