Cancel composition on mouse clicking.

content/browser/renderer_host/render_widget_host_view_win.cc

Index: content/browser/renderer_host/render_widget_host_view_win.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_win.cc b/content/browser/renderer_host/render_widget_host_view_win.cc
index e850512544cf2ca7b15fee62e33676cf691bdf94..1b82608b4c27a29cd71421b8dc49b577f933897e 100644
--- a/content/browser/renderer_host/render_widget_host_view_win.cc
+++ b/content/browser/renderer_host/render_widget_host_view_win.cc
@@ -1818,7 +1818,11 @@ LRESULT RenderWidgetHostViewWin::OnMouseEvent(UINT message, WPARAM wparam,
       case WM_RBUTTONDOWN:
         // Finish the ongoing composition whenever a mouse click happens.
         // It matches IE's behavior.
-        ime_input_.CleanupComposition(m_hWnd);
+        if (base::win::IsTsfAwareRequired()) {
+          ui::TsfBridge::GetInstance()->CancelComposition();
+        } else {
+          ime_input_.CleanupComposition(m_hWnd);
+        }
         // Fall through.
       case WM_MOUSEMOVE:
       case WM_MOUSELEAVE: {