Clean up unused constant globals

chrome/browser/ui/gtk/tabs/tab_strip_gtk.cc

Index: chrome/browser/ui/gtk/tabs/tab_strip_gtk.cc
diff --git a/chrome/browser/ui/gtk/tabs/tab_strip_gtk.cc b/chrome/browser/ui/gtk/tabs/tab_strip_gtk.cc
index 7fbdf1467c022ed031239a0b2f7975897b138435..561e387e13ab1607bceb5f51cd8a3d69cccd7145 100644
--- a/chrome/browser/ui/gtk/tabs/tab_strip_gtk.cc
+++ b/chrome/browser/ui/gtk/tabs/tab_strip_gtk.cc
@@ -58,7 +58,6 @@ namespace {
 const int kDefaultAnimationDurationMs = 100;
 const int kResizeLayoutAnimationDurationMs = 166;
 const int kReorderAnimationDurationMs = 166;
-const int kAnimateToBoundsDurationMs = 150;
 const int kMiniTabAnimationDurationMs = 150;
 
 const int kNewTabButtonHOffset = -5;
@@ -76,8 +75,6 @@ const int kLayoutAfterSizeAllocateMs = 10;
 // start/stop the resize animation.
 const int kTabStripAnimationVSlop = 40;
 
-const int kHorizontalMoveThreshold = 16;  // pixels
-
 // The horizontal offset from one tab to the next, which results in overlapping
 // tabs.
 const int kTabHOffset = -16;