Adds animation as feature variation to keyboard accessory.

components/autofill/core/common/autofill_util.h

Index: components/autofill/core/common/autofill_util.h
diff --git a/components/autofill/core/common/autofill_util.h b/components/autofill/core/common/autofill_util.h
index a9738774580de048b909e43a5b407ab884dbc025..6a67f3ef8704ff75be3fe2617000abbd6e7cf3ef 100644
--- a/components/autofill/core/common/autofill_util.h
+++ b/components/autofill/core/common/autofill_util.h
@@ -13,8 +13,17 @@
 #include "base/strings/string16.h"
 #include "components/autofill/core/common/form_field_data.h"
 
+namespace base {
+struct Feature;
+}
+
 namespace autofill {
 
+extern const base::Feature kAutofillKeyboardAccessory;
+extern const char kAutofillKeyboardAccessoryAnimationDurationKey[];
+extern const char kAutofillKeyboardAccessoryLimitLabelWidthKey[];
+extern const char kAutofillKeyboardAccessoryHintKey[];
+
 // Returns true when command line switch |kEnableSuggestionsWithSubstringMatch|
 // is on.
 bool IsFeatureSubstringMatchEnabled();
@@ -25,6 +34,17 @@ bool IsShowAutofillSignaturesEnabled();
 // Returns true when keyboard accessory is enabled.
 bool IsKeyboardAccessoryEnabled();
 
+// Returns animation duration for keyboard accessory. If 0, we do not animate.
+unsigned int GetKeyboardAccessoryAnimationDuration();
+
+// Returns true if we must limit width of keyboard accessory suggestion label to
+// half of device's pixel width.
+bool ShouldLimitKeyboardAccessorySuggestionLabelWidth();
+
+// Returns true if we show a hint in the keyboard accessory suggestions to call
+// attention to the availability of autofill suggestions.
+bool IsHintEnabledInKeyboardAccessory();
+
 // A token is a sequences of contiguous characters separated by any of the
 // characters that are part of delimiter set {' ', '.', ',', '-', '_', '@'}.