Fix SitePerProcessTextInputManagerTest.StopTrackingCrashedChildFrame on CFI Bots.

content/public/test/text_input_test_utils.h

Index: content/public/test/text_input_test_utils.h
diff --git a/content/public/test/text_input_test_utils.h b/content/public/test/text_input_test_utils.h
index 5b78a5602e4b4c3669e318e37eb0d71a938c8a15..9c7b934a1909c3722e62e651ce7a925c350269be 100644
--- a/content/public/test/text_input_test_utils.h
+++ b/content/public/test/text_input_test_utils.h
@@ -7,6 +7,7 @@
 
 #include <string>
 #include <unordered_map>
+#include <unordered_set>
 #include <vector>
 
 #include "base/callback.h"
@@ -32,6 +33,10 @@ bool GetTextInputTypeForView(WebContents* web_contents,
                              RenderWidgetHostView* view,
                              ui::TextInputType* type);
 
+// This method returns the number of RenderWidgetHostViews which are currently
+// registered with the TextInputManager that is owned by |web_contents|.
+size_t GetRegisteredViewsCountFromTextInputManager(WebContents* web_contents);
+
 // Returns the RWHV corresponding to the frame with a focused <input> within the
 // given WebContents.
 RenderWidgetHostView* GetActiveViewFromWebContents(WebContents* web_contents);