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

chrome/browser/chromeos/status/status_area_view.cc

Index: chrome/browser/chromeos/status/status_area_view.cc
===================================================================
--- chrome/browser/chromeos/status/status_area_view.cc	(revision 74231)
+++ chrome/browser/chromeos/status/status_area_view.cc	(working copy)
@@ -53,7 +53,7 @@
 gfx::Size StatusAreaView::GetPreferredSize() {
   int result_w = kSeparation;
   int result_h = 0;
-  for (int i = 0; i < GetChildViewCount(); i++) {
+  for (int i = 0; i < child_count(); i++) {
     views::View* cur = GetChildViewAt(i);
     if (cur->IsVisible()) {
       gfx::Size cur_size = cur->GetPreferredSize();
@@ -68,7 +68,7 @@
 
 void StatusAreaView::Layout() {
   int cur_x = kSeparation;
-  for (int i = 0; i < GetChildViewCount(); i++) {
+  for (int i = 0; i < child_count(); i++) {
     views::View* cur = GetChildViewAt(i);
     if (cur->IsVisible()) {
       gfx::Size cur_size = cur->GetPreferredSize();