[Mac] Finish implementation of App Tabs.

chrome/browser/cocoa/tab_view.mm

Index: chrome/browser/cocoa/tab_view.mm
===================================================================
--- chrome/browser/cocoa/tab_view.mm	(revision 52312)
+++ chrome/browser/cocoa/tab_view.mm	(working copy)
@@ -610,13 +610,10 @@
   BOOL selected = [self state];
 
   // Outset by 0.5 in order to draw on pixels rather than on borders (which
-  // would cause blurry pixels). For non-app tabs, subtract 1px of height to
-  // compensate, otherwise clipping will occur.
+  // would cause blurry pixels). Subtract 1px of height to compensate, otherwise
+  // clipping will occur.
   rect = NSInsetRect(rect, -0.5, -0.5);
-  if ([controller_ app])
-    rect.size.height = 12.0;
-  else
-    rect.size.height -= 1.0;
+  rect.size.height -= 1.0;
 
   NSPoint bottomLeft = NSMakePoint(NSMinX(rect), NSMinY(rect) + 2);
   NSPoint bottomRight = NSMakePoint(NSMaxX(rect), NSMinY(rect) + 2);