wip: Touch Text Selection Prototypes

ui/touch_selection/selection_granularity.h

Index: ui/touch_selection/selection_granularity.h
diff --git a/ui/touch_selection/selection_granularity.h b/ui/touch_selection/selection_granularity.h
index 14a9bc101ee4412ca5a7ade62317736d3601067f..31c80a8907fbdbb0bfbe544cf8b67cc38f6676b1 100644
--- a/ui/touch_selection/selection_granularity.h
+++ b/ui/touch_selection/selection_granularity.h
@@ -15,6 +15,17 @@ enum TextSelectionGranularity {
   PARAGRAPH_GRANULARITY
 };
 
+enum TextSelectionGranularityStrategy {
+  // Always using CHARACTER_GRANULARITY
+  GRANULARITY_STRATEGY_DEFAULT,
+  // Switches between WORD_GRANULARITY and CHARACTER_GRANULARITY
+  // Depending on whether the selection or growing or shrinking
+  GRANULARITY_STRATEGY_DIRECTION,
+  // Switches between WORD_GRANULARITY and CHARACTER_GRANULARITY
+  // Depending on the handle move velocity.
+  GRANULARITY_STRATEGY_VELOCITY
+};
+
 }  // namespace ui
 
 #endif  // UI_TOUCH_SELECTION_SELECTION_GRANULARITY_