[ar] Disable AR support on 64 bit builds

This configuration does not work, currently.

Bug: 841389
Change-Id: I79a0b357593fbe1a792f6eddab1230ca351bde93
Reviewed-on: https://chromium-review.googlesource.com/1052378
Commit-Queue: Ian Vollick <vollick@chromium.org>
Reviewed-by: Yaron Friedman <yfriedman@chromium.org>
Reviewed-by: Michael Thiessen <mthiesse@chromium.org>
Cr-Commit-Position: refs/heads/master@{#557358}

chrome/android/chrome_public_apk_tmpl.gni

@@ -198,12 +198,13 @@ template("monochrome_public_apk_tmpl") {
       png_to_webp = true
     }
 
-    if (enable_arcore) {
+    if (enable_arcore_java) {
       deps += [
         "//third_party/arcore-android-sdk:libarcore_library",
         "//third_party/arcore-android-sdk:libdynamite_client_java",
       ]
-
+    }
+    if (enable_arcore) {
       # We store this as a separate .so in the APK and only load as needed.
       loadable_modules = [ "${root_out_dir}/libarcore_sdk_c_minimal.so" ]
     }

device/vr/buildflags/buildflags.gni

@@ -31,10 +31,16 @@ declare_args() {
   # Whether to include VR extras like test APKs in non-VR-specific targets
   include_vr_data = false
 
-  # TODO(crbug.com/837999): We currently only support arm and arm64 and we are
-  # limiting to canary and dev until binary size issues are resolved.
-  enable_arcore = is_android && !is_chromecast &&
-                  (current_cpu == "arm" || current_cpu == "arm64") &&
+  # TODO(crbug.com/837999, crbug.com/841389): We currently only support arm and
+  # we are limiting to canary and dev until binary size issues are resolved.
+  enable_arcore = is_android && !is_chromecast && current_cpu == "arm" &&
                   (android_channel == "default" || android_channel == "dev" ||
                    android_channel == "canary")
+
+  # TODO(crbug.com/841389): This should not be necessary once 64 bit is properly
+  # supported and enable_arcore permits arm64 as well.
+  enable_arcore_java = is_android && !is_chromecast &&
+                       (current_cpu == "arm" || current_cpu == "arm64") &&
+                       (android_channel == "default" ||
+                        android_channel == "dev" || android_channel == "canary")
 }