Fix issues blocking the JSCompiler release

Most of these consist of
- invalid type casts
- function declarations in 'if' blocks, which are forbidden in
future versions of JS
- bad generic types

DELTA=2 (2 added, 0 deleted, 0 changed)


Revision created by MOE tool push_codebase.
MOE_MIGRATION=6260


git-svn-id: http://closure-library.googlecode.com/svn/trunk@2507 0b95b8e8-c90f-11de-9d4f-f947ee5921c8

closure/goog/db/error.js

@@ -340,6 +340,8 @@ goog.db.Error.fromRequest = function(request, message) {
  * @param {!IDBDatabaseException} ex The exception that was thrown.
  * @param {string} message The error message to add to err if it's wrapped.
  * @return {!goog.db.Error} The error that caused the failure.
+ * @suppress {invalidCasts} The cast from IDBDatabaseException to DOMError
+ *     is invalid and will not compile.
  */
 goog.db.Error.fromException = function(ex, message) {
   if ('name' in ex) {