Linux: make compile-time dependency on gnome-keyring optional.

build/linux/system.gyp

Index: build/linux/system.gyp
diff --git a/build/linux/system.gyp b/build/linux/system.gyp
index f746ebfef16690b2f9611bd7c3c6c04fec6daf2b..816c584d78f7e0e8500f7cb012bc5cecbecccfee 100644
--- a/build/linux/system.gyp
+++ b/build/linux/system.gyp
@@ -259,11 +259,14 @@
       'target_name': 'gnome-keyring',
       'type': 'settings',
       'conditions': [
-        ['chromeos==0', {
+        ['use_gnome_keyring==1', {

[Evan Martin, 2010/09/15 21:28:27]

Is this still necessary?  Won't this target be unused when use_gnome_keyring is
0, so this won't be evaluated anyway?

...I'm not sure, so I'm asking you.  :)

[Paweł Hajdan Jr., 2010/09/15 21:56:03]

I was getting errors without this if gnome-keyring was not present on the system
(gyp would still evaluate and execute the command).

           'direct_dependent_settings': {
             'cflags': [
               '<!@(<(pkg-config) --cflags gnome-keyring-1)',
             ],
+            'defines': [
+              'USE_GNOME_KEYRING',
+            ],
             'conditions': [
               ['linux_link_gnome_keyring==0', {
                 'defines': ['DLOPEN_GNOME_KEYRING'],