Revert 284508 "GN chrome/common build, rename enable_printing."

> GN chrome/common build, rename enable_printing.
> 
> This adds the missing conditions to the chrome/common GN build file (previously
> only the basic files were there). Some refactoring of the GYP file to make this
> possible.
> 
> Renames the enable_printing flag to printing_mode since this is an integer
> tri-state.
> 
> Minor improvements to chrome/renderer
> 
> R=jamesr@chromium.org
> 
> Review URL: https://codereview.chromium.org/400243003

TBR=brettw@chromium.org

Review URL: https://codereview.chromium.org/409543008

git-svn-id: http://src.chromium.org/svn/trunk/src/build@284517 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

config/BUILD.gn

@@ -52,9 +52,9 @@ config("feature_flags") {
   if (enable_plugins) {
     defines += [ "ENABLE_PLUGINS=1" ]
   }
-  if (printing_mode > 0) {
+  if (enable_printing > 0) {
     defines += [ "ENABLE_PRINTING=1" ]
-    if (printing_mode < 2) {
+    if (enable_printing < 2) {
       defines += [ "ENABLE_FULL_PRINTING=1" ]
     }
   }

config/features.gni

@@ -56,9 +56,9 @@ enable_pepper_cdms = enable_plugins && (is_linux || is_mac || is_win)
 # 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
+  enable_printing = 2
 } else {
-  printing_mode = 1
+  enable_printing = 1
 }
 
 # The seccomp-bpf sandbox is only supported on three architectures

secondary/tools/grit/grit_rule.gni

@@ -121,9 +121,9 @@ if (enable_extensions) {
 if (enable_plugins) {
   grit_defines += [ "-D", "enable_plugins" ]
 }
-if (printing_mode != 0) {
+if (enable_printing != 0) {
   grit_defines += [ "-D", "enable_printing" ]
-  if (printing_mode == 1) {
+  if (enable_printing == 1) {
     grit_defines += [ "-D", "enable_full_printing" ]
   }
 }