Linux: split GNOME Keyring integration into a separate process.

chrome/chrome_exe.gypi

Index: chrome/chrome_exe.gypi
===================================================================
--- chrome/chrome_exe.gypi	(revision 108068)
+++ chrome/chrome_exe.gypi	(working copy)
@@ -553,5 +553,26 @@
         },
       ],
     }],
+    ['OS == "linux" and use_gnome_keyring == 1', {
+      'targets': [
+        {
+          'target_name': 'chrome-keyring-proxy',
+          'type': 'executable',
+          'sources': [
+            'browser/password_manager/proxy/chrome_keyring_proxy.cc',
+            'browser/password_manager/proxy/chrome_keyring_proxy_main.cc',
+            'browser/password_manager/proxy/keyring_loader.cc',
+            'browser/password_manager/proxy/message_reader.cc',
+          ],
+          'dependencies': [
+            '../build/linux/system.gyp:gnome_keyring',
+            '../build/linux/system.gyp:gtk',
+          ],
+          'include_dirs': [
+            '..',
+          ],
+        },
+      ],
+    }],
   ],
 }