Correctly fallback to caret bounds when composition_head is not provided

ui/base/ime/input_method_chromeos.cc

Index: ui/base/ime/input_method_chromeos.cc
diff --git a/ui/base/ime/input_method_chromeos.cc b/ui/base/ime/input_method_chromeos.cc
index 924c9cf968321b28c022dbe6553290bc3929d75f..4de4db2dfbc0c272a34c8030e152a5ef7cd20635 100644
--- a/ui/base/ime/input_method_chromeos.cc
+++ b/ui/base/ime/input_method_chromeos.cc
@@ -180,12 +180,13 @@ void InputMethodChromeOS::OnCaretBoundsChanged(const TextInputClient* client) {
 
   const gfx::Rect caret_rect = client->GetCaretBounds();
 
-  // Pepper doesn't support composition bounds, so fall back to caret bounds to
-  // avoid a bad user experience (the IME window moved to upper left corner).
   gfx::Rect composition_head;
   if (client->HasCompositionText())
     client->GetCompositionCharacterBounds(0, &composition_head);
-  else
+
+  // Pepper doesn't support composition bounds, so fall back to caret bounds to
+  // avoid a bad user experience (the IME window moved to upper left corner).
+  if (composition_head.IsEmpty())
     composition_head = caret_rect;
   candidate_window->SetCursorBounds(caret_rect, composition_head);