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

components/translate/content/common/cld_data_source.h

Index: components/translate/content/common/cld_data_source.h
diff --git a/components/translate/content/common/cld_data_source.h b/components/translate/content/common/cld_data_source.h
index 1ba6511561dfb276a3fca210a083a5c3cfec6414..07a56b0437a6894c0ff105608f86ff68a9126033 100644
--- a/components/translate/content/common/cld_data_source.h
+++ b/components/translate/content/common/cld_data_source.h
@@ -24,9 +24,24 @@ class CldDataSource {
   //              implementations.
   //
   // Other implementations based upon Chromium may provide CLD differently and
-  // may have other names.
+  // may have other names. This method is primarily provided for those
+  // non-Chromium implementations; Chromium implementations should use the
+  // boolean methods in this class instead:
+  // ShouldRegisterForComponentUpdates()
+  // ShouldUseStandaloneDataFile()
   static std::string GetName();
 
+  // Returns true if the data source needs to receive updates from the
+  // Component Updater.
+  // This is only true if the data source name is "component", but makes caller
+  // logic more generic.
+  static bool ShouldRegisterForComponentUpdates();
+
+  // Returns true if the data source needs to have the path to the CLD
+  // data file configured immediately because it is bundled with Chromium.
+  // This is only true if the data source name is "standalone", but makes
+  // caller logic more generic.
+  static bool ShouldUseStandaloneDataFile();
 };
 
 }  // namespace translate