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

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

Index: chrome/browser/ui/views/omnibox/omnibox_view_win.cc
diff --git a/chrome/browser/ui/views/omnibox/omnibox_view_win.cc b/chrome/browser/ui/views/omnibox/omnibox_view_win.cc
index ae13c7ba8bd021656b6772f013109f329683af4e..f998e34c6c6897524e9905b724eb1259e81b034e 100644
--- a/chrome/browser/ui/views/omnibox/omnibox_view_win.cc
+++ b/chrome/browser/ui/views/omnibox/omnibox_view_win.cc
@@ -420,6 +420,7 @@ OmniboxViewWin::OmniboxViewWin(const gfx::Font& font,
       in_drag_(false),
       initiated_drag_(false),
       drop_highlight_position_(-1),
+      ime_candidate_window_open_(false),
       background_color_(skia::SkColorToCOLORREF(LocationBarView::GetColor(
           ToolbarModel::NONE, LocationBarView::BACKGROUND))),
       security_level_(ToolbarModel::NONE),
@@ -951,6 +952,12 @@ bool OmniboxViewWin::IsImeComposing() const {
   return ime_composing;
 }
 
+bool OmniboxViewWin::ShouldHideAutocompletePopup() const {
+  // Don't let the autocomplete popup be shown when IME candidate window is
+  // open, so they don't overlap.
+  return ime_candidate_window_open_;
+}
+
 views::View* OmniboxViewWin::AddToView(views::View* parent) {
   views::NativeViewHost* host = new views::NativeViewHost;
   parent->AddChildView(host);
@@ -1351,6 +1358,22 @@ LRESULT OmniboxViewWin::OnGetObject(UINT uMsg,
   return 0;
 }
 
+LRESULT OmniboxViewWin::OnImeNotify(UINT message,
+                                    WPARAM wparam,
+                                    LPARAM lparam) {
+  switch (wparam) {
+    case IMN_OPENCANDIDATE:
+      ime_candidate_window_open_ = true;
+      break;
+    case IMN_CLOSECANDIDATE:
+      ime_candidate_window_open_ = false;
+      break;
+    default:
+      break;
+  }
+  return DefWindowProc(message, wparam, lparam);
+}
+
 LRESULT OmniboxViewWin::OnImeComposition(UINT message,
                                          WPARAM wparam,
                                          LPARAM lparam) {