[ash-md] Added different highlighting modes to the InkDropImpl.

ui/views/animation/ink_drop_host.h

Index: ui/views/animation/ink_drop_host.h
diff --git a/ui/views/animation/ink_drop_host.h b/ui/views/animation/ink_drop_host.h
index d6b39bf2344efd6e27223ad15265f2704ab49554..dee86389f9a401c8f44d6331e36305ce2a853194 100644
--- a/ui/views/animation/ink_drop_host.h
+++ b/ui/views/animation/ink_drop_host.h
@@ -17,6 +17,7 @@ class Layer;
 
 namespace views {
 
+class InkDrop;
 class InkDropRipple;
 class InkDropHighlight;
 
@@ -38,6 +39,9 @@ class VIEWS_EXPORT InkDropHost {
   // Removes |ink_drop_layer| from the layer tree.
   virtual void RemoveInkDropLayer(ui::Layer* ink_drop_layer) = 0;
 
+  // Returns a configured InkDrop.

[sky, 2016/11/02 02:52:11]

I have to admit I'm confused by the function names here and what the
expectations area. When does one need to be overriden and not the others? Using
the name of the effect rather than the state the effect is used for makes it
confusing. Consider CreateInkDropForPress, and CreateInkDropForHoverAndFocus(),
that makes it clear what the the effect is used for.

[bruthig, 2016/11/04 18:50:36]

I've updated the docs as an interim fix.  I will take this into consideration
when re-working how Views actually choose which ink drop style to use.

+  virtual std::unique_ptr<InkDrop> CreateInkDrop() = 0;
+
   // Creates and returns the effect used for press.
   virtual std::unique_ptr<InkDropRipple> CreateInkDropRipple() const = 0;