Replace Increment/DecrementKeepAliveCount by ScopedKeepAlives

chrome/browser/devtools/devtools_sanity_browsertest.cc

Index: chrome/browser/devtools/devtools_sanity_browsertest.cc
diff --git a/chrome/browser/devtools/devtools_sanity_browsertest.cc b/chrome/browser/devtools/devtools_sanity_browsertest.cc
index 62b3284bce8931490d4e61dc68e21ab6eb4a1116..8febbb88d2137617fa945b4c9200890a4871266b 100644
--- a/chrome/browser/devtools/devtools_sanity_browsertest.cc
+++ b/chrome/browser/devtools/devtools_sanity_browsertest.cc
@@ -771,7 +771,8 @@ IN_PROC_BROWSER_TEST_F(DevToolsBeforeUnloadTest,
     content::WindowedNotificationObserver close_observer(
         chrome::NOTIFICATION_BROWSER_CLOSED,
         content::Source<Browser>(browser()));
-    chrome::IncrementKeepAliveCount();

[dgn, 2016/03/09 23:49:23]

TODO: have a better look at this, which was added to unflake the test
(crbug.com/333554, 323847). Not sure which decrement call it pairs with.

+    // TODO(dgn): Was added to unflake the test: crbug.com/333554, 323847
+    // chrome::IncrementKeepAliveCount();
     chrome::CloseAllBrowsers();
     AcceptModalDialog();
     AcceptModalDialog();