Convert uses of int ms to TimeDelta in chrome/browser and net.

chrome/browser/debugger/devtools_sanity_unittest.cc

Index: chrome/browser/debugger/devtools_sanity_unittest.cc
diff --git a/chrome/browser/debugger/devtools_sanity_unittest.cc b/chrome/browser/debugger/devtools_sanity_unittest.cc
index a49010e2bfea0cde118a13f942d50c9ab7b0e929..52c272a46e5d8275b4bb4035f0131c2f12a4d799 100644
--- a/chrome/browser/debugger/devtools_sanity_unittest.cc
+++ b/chrome/browser/debugger/devtools_sanity_unittest.cc
@@ -203,7 +203,7 @@ class DevToolsExtensionTest : public DevToolsSanityTest,
       base::CancelableClosure timeout(
           base::Bind(&TimeoutCallback, "Extension load timed out."));
       MessageLoop::current()->PostDelayedTask(
-          FROM_HERE, timeout.callback(), 4 * 1000);
+          FROM_HERE, timeout.callback(), base::TimeDelta::FromSeconds(4));
       extensions::UnpackedInstaller::Create(service)->Load(path);
       ui_test_utils::RunMessageLoop();
       timeout.Cancel();
@@ -226,7 +226,7 @@ class DevToolsExtensionTest : public DevToolsSanityTest,
     base::CancelableClosure timeout(
         base::Bind(&TimeoutCallback, "Extension host load timed out."));
     MessageLoop::current()->PostDelayedTask(
-        FROM_HERE, timeout.callback(), 4 * 1000);
+        FROM_HERE, timeout.callback(), base::TimeDelta::FromSeconds(4));
 
     ExtensionProcessManager* manager =
           browser()->profile()->GetExtensionProcessManager();