Rename WindowTreeHost functions to indicate pixels/dips.

ui/aura/window_tree_host_observer.h

Index: ui/aura/window_tree_host_observer.h
diff --git a/ui/aura/window_tree_host_observer.h b/ui/aura/window_tree_host_observer.h
index 620cc885ade1e11c6451ee806eace01c6ee92b0b..fea704913756abc4d25052dc10df1bda2467dadc 100644
--- a/ui/aura/window_tree_host_observer.h
+++ b/ui/aura/window_tree_host_observer.h
@@ -20,8 +20,8 @@ class AURA_EXPORT WindowTreeHostObserver {
   virtual void OnHostResized(const WindowTreeHost* host) {}
 
   // Called when the host is moved on screen.
-  virtual void OnHostMoved(const WindowTreeHost* host,
-                           const gfx::Point& new_origin) {}
+  virtual void OnHostMovedInPixel(const WindowTreeHost* host,
+                                  const gfx::Point& new_origin_in_pixel) {}
 
   // Called when the host is moved to a different workspace.
   virtual void OnHostWorkspaceChanged(const WindowTreeHost* host) {}