Make IPC::Logging register to watch for message loop destruction.

chrome/browser/browser_uitest.cc

Index: chrome/browser/browser_uitest.cc
===================================================================
--- chrome/browser/browser_uitest.cc	(revision 10364)
+++ chrome/browser/browser_uitest.cc	(working copy)
@@ -89,9 +89,7 @@
 // exact number of processes depends on the amount of memory. Previously we
 // had a hard limit of 31 processes and this test is mainly directed at
 // verifying that we don't crash when we pass this limit.
-// Disabling this test as it is making all the buildbots running ui tests red.
-// see http://code.google.com/p/chromium/issues/detail?id=5668
-TEST_F(BrowserTest, DISABLED_ThirtyFourTabs) {
+TEST_F(BrowserTest, ThirtyFourTabs) {
   std::wstring test_file = test_data_directory_;
   file_util::AppendToPath(&test_file, L"title2.html");
   GURL url(net::FilePathToFileURL(test_file));