No need to have DevToolsManager reference counted

Now that ForceReopenWindow method is gone(in r91695), the browser process should own the DevToolsManager.

BUG=None
TEST=existing DevTools tests

Review URL: http://codereview.chromium.org/7461125

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@95396 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/browser_process_impl.cc b/chrome/browser/browser_process_impl.cc
index c8f2b1e..d3ae109 100644
--- a/chrome/browser/browser_process_impl.cc
+++ b/chrome/browser/browser_process_impl.cc
@@ -914,7 +914,7 @@
 void BrowserProcessImpl::CreateDevToolsManager() {
   DCHECK(devtools_manager_.get() == NULL);
   created_devtools_manager_ = true;
-  devtools_manager_ = new DevToolsManager();
+  devtools_manager_.reset(new DevToolsManager());
 }
 
 void BrowserProcessImpl::CreateSidebarManager() {