add show_about_flag_aura_window_mode in common.gypi

chrome/browser/about_flags.cc

Index: chrome/browser/about_flags.cc
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index cf867b331dac1840fe65881fccaa8c503de91c8d..249c89eac2399a0500436ce02cab4ce9201825d0 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -41,7 +41,6 @@ namespace about_flags {
     Experiment::MULTI_VALUE, "", "", choices, arraysize(choices)
 
 namespace {
-
 const unsigned kOsAll = kOsMac | kOsWin | kOsLinux | kOsCrOS;
 
 // Adds a |StringValue| to |list| for each platform where |bitmask| indicates
@@ -473,7 +472,7 @@ const Experiment kExperiments[] = {
     kOsMac | kOsWin,
     SINGLE_VALUE_TYPE(switches::kEnableGamepad)
   },
-#if defined(USE_AURA)
+#if defined(USE_AURA) && defined(SHOW_ABOUT_FLAG_AURA_WINDOW_MODE)

[James Cook, 2012/01/07 04:26:48]

Maybe this should be a single #if defined(AURA_SHOW_ABOUT_FLAG_WINDOW_MODE)?  Or
ENABLE_AURA_WINDOW_MODE?

[alicet1, 2012/01/09 08:52:16]

Done.

   // TODO(jamescook): Enable this for all ChromeOS builds when we're sure
   // Aura laptop mode performance and feature set match traditional non-Aura
   // builds.