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

chrome/browser/ui/views/omnibox/omnibox_view_win.h

Index: chrome/browser/ui/views/omnibox/omnibox_view_win.h
diff --git a/chrome/browser/ui/views/omnibox/omnibox_view_win.h b/chrome/browser/ui/views/omnibox/omnibox_view_win.h
index 207af0bdbb83ced0277bd10ccf7315ab1784e0c6..5e9ea288eeda01569c100774840a5f2b4075bb67 100644
--- a/chrome/browser/ui/views/omnibox/omnibox_view_win.h
+++ b/chrome/browser/ui/views/omnibox/omnibox_view_win.h
@@ -186,6 +186,7 @@ class OmniboxViewWin
     MSG_WM_CUT(OnCut)
     MESSAGE_HANDLER_EX(WM_GETOBJECT, OnGetObject)
     MESSAGE_HANDLER_EX(WM_IME_COMPOSITION, OnImeComposition)
+    MESSAGE_HANDLER_EX(WM_IME_NOTIFY, OnImeNotify)
     MSG_WM_KEYDOWN(OnKeyDown)
     MSG_WM_KEYUP(OnKeyUp)
     MSG_WM_KILLFOCUS(OnKillFocus)
@@ -284,6 +285,7 @@ class OmniboxViewWin
   void OnCut();
   LRESULT OnGetObject(UINT uMsg, WPARAM wparam, LPARAM lparam);
   LRESULT OnImeComposition(UINT message, WPARAM wparam, LPARAM lparam);
+  LRESULT OnImeNotify(UINT message, WPARAM wparam, LPARAM lparam);
   void OnKeyDown(TCHAR key, UINT repeat_count, UINT flags);
   void OnKeyUp(TCHAR key, UINT repeat_count, UINT flags);
   void OnKillFocus(HWND focus_wnd);
@@ -530,6 +532,10 @@ class OmniboxViewWin
   // Position of the drop highlight.  If this is -1, there is no drop highlight.
   int drop_highlight_position_;
 
+  // True if the IME candidate window is open.  When this is true, we want to
+  // avoid showing the popup.
+  bool ime_candidate_window_open_;
+
   // Security UI-related data.
   COLORREF background_color_;
   ToolbarModel::SecurityLevel security_level_;