Rework tree APIs to reflect Google style and more const-correctness....

views/layout/grid_layout_unittest.cc

Index: views/layout/grid_layout_unittest.cc
===================================================================
--- views/layout/grid_layout_unittest.cc	(revision 74117)
+++ views/layout/grid_layout_unittest.cc	(working copy)
@@ -62,9 +62,8 @@
   }
 
   virtual void RemoveAll() {
-    for (int i = host.GetChildViewCount() - 1; i >= 0; i--) {
+    for (size_t i = host.child_count() - 1; i >= 0; i--)

[sky, 2011/02/08 19:11:54]

THis never stops.

PS I don't like size_t

       host.RemoveChildView(host.GetChildViewAt(i));
-    }
   }
 
   void GetPreferredSize() {
@@ -92,9 +91,8 @@
   }
 
   virtual void RemoveAll() {
-    for (int i = host.GetChildViewCount() - 1; i >= 0; i--) {
+    for (size_t i = host.child_count() - 1; i >= 0; i--)

[sky, 2011/02/08 19:11:54]

This never stops.

PS I don't like size_t

       host.RemoveChildView(host.GetChildViewAt(i));
-    }
   }
 
   void TestAlignment(GridLayout::Alignment alignment, gfx::Rect* bounds) {