Replace the use of CLD_DATA_FROM* and CLD-related ifdefs with runtime checks.

components/translate/content/common/standalone_cld_data_source.cc

Index: components/translate/content/common/standalone_cld_data_source.cc
diff --git a/components/translate/content/common/standalone_cld_data_source.cc b/components/translate/content/common/standalone_cld_data_source.cc
index 1e715c348e3717c5102a47de860ba1c6270f8017..154c9966ee8ac23654203978fa61a3c8a530c3aa 100644
--- a/components/translate/content/common/standalone_cld_data_source.cc
+++ b/components/translate/content/common/standalone_cld_data_source.cc
@@ -10,4 +10,12 @@ namespace translate {
     return "standalone";
   }
 
+  bool CldDataSource::ShouldRegisterForComponentUpdates() {
+    return false;
+  }
+
+  bool CldDataSource::ShouldUseStandaloneDataFile() {
+    return true;
+  }
+
 }  // namespace translate