[Chromecast] Set the cast_product_type to the correct value on Android.

chromecast/base/BUILD.gn

Index: chromecast/base/BUILD.gn
diff --git a/chromecast/base/BUILD.gn b/chromecast/base/BUILD.gn
index b807ad8ed494df7e0cf340779ee659b51a2579f4..9c644b3ab170aa38ae720b7c804ad9c3868b9ada 100644
--- a/chromecast/base/BUILD.gn
+++ b/chromecast/base/BUILD.gn
@@ -13,7 +13,12 @@ if (is_android) {
 declare_args() {

[slan, 2016/08/29 03:11:20]

Simeon, I take back my earlier comment, could we do something like this instead?

declare_args() {
  # Existing comment.
  if (is_android) {
    cast_product_type = 4
  } else {
    cast_product_type = 0
  }
}

if (is_android) {
  assert(cast_product_type == 4)
} else {
  assert(cast_product_type >= 0 && cast_product_type <= 3)
}

Thanks.

   # Denotes the type of Cast product. This is #defined as CAST_PRODUCT_TYPE in
   # version.h. This is an integer in the range [0-4].
-  cast_product_type = 0
+  cast_product_type = -1
+}
+
+if (is_android) {
+  assert(cast_product_type == -1)
+  cast_product_type = 4
 }
 
 assert(cast_product_type >= 0 && cast_product_type <= 4)