[chromeos]Allow input method can get tab key when inputting in omnibox.

chrome/browser/views/location_bar/location_bar_view.cc

Index: chrome/browser/views/location_bar/location_bar_view.cc
diff --git a/chrome/browser/views/location_bar/location_bar_view.cc b/chrome/browser/views/location_bar/location_bar_view.cc
index 781d082793cfd8fa5d9262bc6f7c78b3b1a080af..8ed874da7d35c6843905815d3962f86dea4c0130 100644
--- a/chrome/browser/views/location_bar/location_bar_view.cc
+++ b/chrome/browser/views/location_bar/location_bar_view.cc
@@ -885,9 +885,10 @@ bool LocationBarView::SkipDefaultKeyEventProcessing(const views::KeyEvent& e) {
   // TODO(jcampan): We need to refactor the code of
   // AutocompleteEditViewWin::SkipDefaultKeyEventProcessing into this class so
   // it can be shared between Windows and Linux.
-  // For now, we just override back-space as it is the accelerator for back
-  // navigation.
-  if (e.GetKeyCode() == base::VKEY_BACK)
+  // For now, we just override back-space and tab keys, as back-space is the
+  // accelerator for back navigation and tab key is used by some input methods.
+  if (e.GetKeyCode() == base::VKEY_BACK ||
+      views::FocusManager::IsTabTraversalKeyEvent(e))
     return true;
   return false;
 #endif