Make cld2_table_size configurable in GN builds

build/config/features.gni

Index: build/config/features.gni
diff --git a/build/config/features.gni b/build/config/features.gni
index 9a29d5e11fb92eb9e6c63ea4f370300fa56d1cea..c50aebe510c09ba9551fc2fcbbfc29a2cebb1ec7 100644
--- a/build/config/features.gni
+++ b/build/config/features.gni
@@ -21,6 +21,12 @@ if (is_android) {
 }
 
 declare_args() {
+  if (is_android || is_ios) {

[brettw, 2015/10/01 17:24:22]

I notice this is only used in third_party/cld_2/BUILD.gn now. We can just move
this block (enclosed by declare_args()) to that file so it's not global any
more, which will help clean this up.

[Tomasz Moniuszko, 2015/10/02 07:56:41]

Done. It seems that there was another cld2_table_size=2 assignment in
third_party/cld_2/BUILD.gn already. I removed it because it would overwrite the
default values. Now cld2_table_size is defined like in GYP version: 0 on Android
and iOS, 2 on other platforms.

+    cld2_table_size = 0  # Small, accurate tables
+  } else {
+    cld2_table_size = 2  # Larger, more accurate tables
+  }
+
   # Multicast DNS.
   enable_mdns = is_win || is_linux
 
@@ -125,12 +131,6 @@ declare_args() {
 #   2: Use only CLD2.
 cld_version = 2
 
-if (is_android || is_ios) {
-  cld2_table_size = 0  # Small, accurate tables
-} else {
-  cld2_table_size = 2  # Larger, more accurate tables
-}
-
 # libudev usage. This currently only affects the content layer.
 use_udev = is_linux && !is_chromecast