Change the default channel for ExtensionBrowserTests from dev to trunk.

R=aboxhall@chromium.org

Review URL: https://codereview.chromium.org/232563009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@263130 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/extensions/extension_browsertest.cc

@@ -62,7 +62,9 @@ ExtensionBrowserTest::ExtensionBrowserTest()
 #if defined(OS_CHROMEOS)
       set_chromeos_user_(true),
 #endif
-      current_channel_(chrome::VersionInfo::CHANNEL_DEV),
+      // Default channel is STABLE but override with UNKNOWN so that unlaunched
+      // or incomplete APIs can write tests.
+      current_channel_(chrome::VersionInfo::CHANNEL_UNKNOWN),
       override_prompt_for_external_extensions_(
           FeatureSwitch::prompt_for_external_extensions(),
           false),