Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/683da6d984f8
Author: Ed Morley <emorley@mozilla.com>
Desc: Revert "Bug 1045523 - customize default window size of responsive web design" for build failures

This reverts commit 72b887d20811cbf00c080922c358738c9c9dd886.

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https://hg.mozilla.org/integration/gaia-central/rev/19d68aebc93d
Author: Jan Jongboom <janjongboom@gmail.com>
Desc: Merge pull request #22401 from comoyo/bug1046798

Bug 1046798 - Yield uppercase suggestions if input is uppercase. r=djf

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https://hg.mozilla.org/integration/gaia-central/rev/4aee9eac99a2
Author: Jan Jongboom <janjongboom@gmail.com>
Desc: Bug 1046798 - Yield uppercase suggestions if input is uppercase

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "72013ef0318fab1b633559f3a9d8d6b4c56b95c8", 
+    "revision": "683da6d984f8fe731d98ea16fc9d127f604f330c", 
     "repo_path": "/integration/gaia-central"
 }