Revert 165562 - Bump English spellcheck dictionary versions and add tests

chrome/common/spellcheck_common.cc

Index: chrome/common/spellcheck_common.cc
===================================================================
--- chrome/common/spellcheck_common.cc	(revision 165576)
+++ chrome/common/spellcheck_common.cc	(working copy)
@@ -105,15 +105,14 @@
     {"uk-UA", "-2-0"},
     {"pt-BR", "-2-2"},  // 2-2 (Mar 2011): upgraded a dictionary.
     {"sh",    "-2-2"},  // 2-2 (Mar 2011): added a dictionary.
+    {"en-US", "-2-3"},  // 2-3 (May 2012): fixed affixes + more words.
+    {"en-CA", "-2-3"},
+    {"en-GB", "-2-3"},
+    {"en-AU", "-2-3"},
     {"ca-ES", "-2-3"},  // 2-3 (May 2012): upgraded a dictionary.
     {"sv-SE", "-2-3"},  // 2-3 (May 2012): upgraded a dictionary.
     {"af-ZA", "-2-3"},  // 2-3 (May 2012): added a dictionary.
     {"fo-FO", "-2-3"},  // 2-3 (May 2012): added a dictionary.
-    {"en-US", "-2-4"},  // 2-4 (October 2012): add more words.
-    {"en-CA", "-2-4"},
-    {"en-GB", "-2-4"},
-    {"en-AU", "-2-4"},
-
   };
 
   // Generate the bdict file name using default version string or special