Renamed enable_printing and printing_mode in *.gyp* and .*gn* files.

build/config/features.gni

Index: build/config/features.gni
diff --git a/build/config/features.gni b/build/config/features.gni
index 49fe155254c1558284f9fc49f4570af1b36f3e82..8227ee9b0de7869109ba81eb5891ad599bdadd99 100644
--- a/build/config/features.gni
+++ b/build/config/features.gni
@@ -63,15 +63,12 @@ enable_pepper_cdms = enable_plugins && (is_linux || is_mac || is_win)
 
 enable_browser_cdms = is_android
 
-# Enable printing support and UI. This variable is used to configure which
-# parts of printing will be built. 0 disables printing completely, 1 enables it
-# fully, and 2 enables only the codepath to generate a Metafile (e.g.  usually
-# a PDF or EMF) and disables print preview, cloud print, UI, etc.
-if (is_android) {
-  printing_mode = 2
-} else {
-  printing_mode = 1
-}
+# Enable basic printing support and UI.
+enable_basic_printing = true
+
+# Enable printing with print preview. It does not imply
+# enable_basic_printing. It's possible to build Chrome with preview only.
+enable_print_preview = !is_android
 
 # The seccomp-bpf sandbox is only supported on three architectures
 # currently.