Replace "Throwables.propagate(e); unreachableExitingStatement;" with equivalent "throw Throwables.propagate(e)."

CL automatically created by:
replace_string --pcre
(?m)^(\s*)(Throwables[.]propagate[(][^};]*[)];)\s*\b(?:throw|return)\b[^};]*;(?: *//[^\n]*)?
$1throw $2

I could make some additional improvements by removing the requirement that the next statement be a throw or return, but that would make changes that aren't necessarily safe, and indeed some are breakages.

Review by: [email protected]

git-svn-id: http://google-web-toolkit.googlecode.com/svn/trunk@11523 8db76d5a-ed1c-0410-87a9-c151d255dfc7

Author: [email protected]

dev/core/src/com/google/gwt/dev/js/ClosureJsRunner.java

@@ -208,8 +208,7 @@ protected List<JSSourceFile> getDefaultExternsList() {
       defaultExterns = getDefaultExterns();
       return defaultExterns;
     } catch (IOException e) {
-      Throwables.propagate(e);
-      return null;
+      throw Throwables.propagate(e);
     }
   }