allow unofficial builds with DCHECK and DLOG disabled

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index 06fda3714ece9d3ae13c28c24861ddcab6afe56b..fb410f97ce01811dff637c9e32797c57e9569131 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -201,6 +201,10 @@
       # Set to 1 to enable dcheck in release without having to use the flag.
       'dcheck_always_on%': 0,
 
+      # Set to 1 to make a build that logs like an official build, but is not
+      # necessarily an official build.
+      'logging_is_official_build%': 0,

[Mark Mentovai, 2013/06/20 16:09:42]

_like_ makes more sense than _is_.

Document that this is ignored in real official builds.

[Mostyn Bramley-Moore, 2013/06/20 19:24:30]

Done in patchset 2.

I also rejigged the ifdeffery to make sure this setting does not affect official
builds or debug builds.

+
       # Disable file manager component extension by default.
       'file_manager_extension%': 0,
 
@@ -761,6 +765,7 @@
     'image_loader_extension%': '<(image_loader_extension)',
     'fastbuild%': '<(fastbuild)',
     'dcheck_always_on%': '<(dcheck_always_on)',
+    'logging_is_official_build%': '<(logging_is_official_build)',
     'python_ver%': '<(python_ver)',
     'arm_version%': '<(arm_version)',
     'armv7%': '<(armv7)',
@@ -2047,6 +2052,9 @@
       ['dcheck_always_on!=0', {
         'defines': ['DCHECK_ALWAYS_ON=1'],
       }],  # dcheck_always_on!=0
+      ['logging_is_official_build!=0', {
+        'defines': ['LOGGING_IS_OFFICIAL_BUILD=1'],
+      }],  # logging_is_official_build!=0
       ['win_use_allocator_shim==0', {
         'conditions': [
           ['OS=="win"', {