Add origin() method on View and use it to simplify some callers.

chrome/browser/ui/views/tabs/tab_strip.cc

Index: chrome/browser/ui/views/tabs/tab_strip.cc
diff --git a/chrome/browser/ui/views/tabs/tab_strip.cc b/chrome/browser/ui/views/tabs/tab_strip.cc
index cc5b5e993f5ddaba62970cfd07f93f6219a3dbc0..1e6c8ef79f9c1c7955067f90403798fd5867899e 100644
--- a/chrome/browser/ui/views/tabs/tab_strip.cc
+++ b/chrome/browser/ui/views/tabs/tab_strip.cc
@@ -2593,8 +2593,7 @@ void TabStrip::SwapLayoutIfNecessary() {
     return;
 
   if (needs_touch) {
-    gfx::Size tab_size(Tab::GetMinimumActiveSize());
-    tab_size.set_width(Tab::GetTouchWidth());
+    gfx::Size tab_size(Tab::GetTouchWidth(), GetLayoutConstant(TAB_HEIGHT));

[Peter Kasting, 2016/12/21 22:56:20]

This isn't related to the rest of the CL, it snuck in as a separate
simplification.

It makes no behavior change (GetMinimumActiveSize() already used TAB_HEIGHT for
the height), it's just shorter and more efficient.

     touch_layout_.reset(new StackedTabStripLayout(
         tab_size, Tab::kOverlap, kStackedPadding, kMaxStackedCount, &tabs_));
     touch_layout_->SetWidth(GetTabAreaWidth());