Add a flag to enable Translate Compact Infobar on Android.

chrome/browser/about_flags.cc

Index: chrome/browser/about_flags.cc
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index 333dbe006df7462a243584b050ea2da6b0e7465c..e989f9fb619a6be4e055b25352fe9f4d4ea957c2 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -68,6 +68,7 @@
 #include "components/strings/grit/components_strings.h"
 #include "components/sync/driver/sync_driver_switches.h"
 #include "components/tracing/common/tracing_switches.h"
+#include "components/translate/core/browser/translate_infobar_delegate.h"
 #include "components/translate/core/browser/translate_manager.h"
 #include "components/translate/core/browser/translate_prefs.h"
 #include "components/version_info/version_info.h"
@@ -1585,6 +1586,11 @@ const FeatureEntry kFeatureEntries[] = {
      flag_descriptions::kPullToRefreshEffectDescription, kOsAndroid,
      SINGLE_DISABLE_VALUE_TYPE(switches::kDisablePullToRefreshEffect)},
 #endif  // OS_ANDROID
+#if defined(OS_ANDROID)

[gone, 2017/05/04 01:37:07]

can you just combine this OS_ANDROID block with the one above? (remove lines
1588 & 1589)

[Leo, 2017/05/05 02:27:54]

Done.

+    {"translate-compact-infobar", flag_descriptions::kTranslateCompactUIName,
+     flag_descriptions::kTranslateCompactUIDescription, kOsAndroid,
+     FEATURE_VALUE_TYPE(translate::kTranslateCompactUI)},
+#endif  // OS_ANDROID
 #if defined(OS_MACOSX)
     {"enable-translate-new-ux", flag_descriptions::kTranslateNewUxName,
      flag_descriptions::kTranslateNewUxDescription, kOsMac,