DevTools: rename debugger/ to devtools/, move DevTools files into content/renderer/devtools.

content/browser/debugger/manual_tests/debugger-step-on-for-in-statements.html

-<script>
-var myObj = {test : 1};
-function getObject()
-{
-    return myObj;
-}
-
-function statement() {
-    ;
-}
-
-function runForIn()
-{
-    /* place breakpoint on next line and click continue */ debugger;
-    for (var property in getObject())
-        statement();
-}
-
-</script>
-<p>To test, open the DevTools (Ctrl+Shift+I) and reload the page.
-<br><br>
-Before running the tests please perform the following:
-Make sure the execution is not paused in the debugger.<br>
-Click the button and when the debugger breaks, set a breakpoint on the first line in the loop
-(as indicated by the comment), and click continue.<br>
-The debugger should stop at the beggining of the loop.<br>
-The above actions should be performed before <b>each</b> of the following tests.</p>
-<br><br>
-<input type="button" value="run for-in" onclick="runForIn()"/>
-<br><br>
-TEST 1: Click 'continue'. Execution should continue without stopping on the loop breakpoint again.<br>
-TEST 2: Click 'Step over'. Debugger should step inside the loop to the next statement line.<br>
-TEST 3: Click 'Step into'. Debugger should step into 'getObject' function.<br>
-TEST 4: 'Step over' to the statement line and then 'Step over' again. Debugger should pause on
-the for-in loop again.<br>