Wholesale move of debugger sources to content.

content/browser/debugger/manual_tests/debugger-watch-expressions.html

 <p>Test for watched expression</p>
 
 <p>To begin test, open DevTools, go the Scripts Panel 
 and then click this link: <a href="javascript:runTest()">[begin test]</a>.
 
 <p>Perform the following steps, and note the expected results:
     
 <ol>
     
 <li><p>After clicking the link above, you should now be paused in the body of 
@@ skipping 59 matching lines @@
     var b = "b in runTest()";
     var c = "c in runTest()";
     
     subFunction();
     
     var object = new aClass();
     object.aMethod();
     
 }
 </script>