Hide autocomplete popup when IME candidate window is open (on Windows).

chrome/browser/ui/omnibox/omnibox_view.h

Index: chrome/browser/ui/omnibox/omnibox_view.h
diff --git a/chrome/browser/ui/omnibox/omnibox_view.h b/chrome/browser/ui/omnibox/omnibox_view.h
index 1d2253b46e9f92c321c091d9a10094f90f6ac9c2..990d45ce3051a085f792599489f9e89e2d51255d 100644
--- a/chrome/browser/ui/omnibox/omnibox_view.h
+++ b/chrome/browser/ui/omnibox/omnibox_view.h
@@ -182,6 +182,10 @@ class OmniboxView {
   // Returns true if the user is composing something in an IME.
   virtual bool IsImeComposing() const = 0;
 
+  // Returns true if the autocomplete popup should not be shown, for example,
+  // because the IME candidate window is open.
+  virtual bool ShouldHideAutocompletePopup() const;
+
 #if defined(TOOLKIT_VIEWS)
   // Adds the autocomplete edit view to view hierarchy and
   // returns the views::View of the edit view.