Add a win_force_console=1 GYP flag that makes chrome.exe and nacl64.exe console applications

chrome/chrome_exe.gypi

Index: chrome/chrome_exe.gypi
diff --git a/chrome/chrome_exe.gypi b/chrome/chrome_exe.gypi
index 30dccfde589eb031364cc64f2eed08e046c6bbf3..a9e9c675bf46ece28d748e6e4bc540431e50d729 100644
--- a/chrome/chrome_exe.gypi
+++ b/chrome/chrome_exe.gypi
@@ -518,9 +518,7 @@
               ],
               'AdditionalDependencies': [ 'wintrust.lib' ],
               'conditions': [
-                ['asan==0', {
-                  # Set /SUBSYSTEM:WINDOWS for chrome.exe itself, except for the
-                  # AddressSanitizer build where console output is important.
+                ['win_force_console==0', {
                   'SubSystem': '2',
                 }],
               ],
@@ -648,7 +646,11 @@
               'msvs_settings': {
                 'VCLinkerTool': {
                   'ImportLibrary': '$(OutDir)\\lib\\nacl64_exe.lib',
-                  'SubSystem': '2',         # Set /SUBSYSTEM:WINDOWS
+                  'conditions': [
+                    ['win_force_console==0', {
+                      'SubSystem': '2',         # Set /SUBSYSTEM:WINDOWS
+                    }],
+                  ],
                 },
               },
               'configurations': {