[Mac][Material Design] Center elements within the toolbar.

chrome/browser/ui/cocoa/toolbar/toolbar_controller.mm

Index: chrome/browser/ui/cocoa/toolbar/toolbar_controller.mm
diff --git a/chrome/browser/ui/cocoa/toolbar/toolbar_controller.mm b/chrome/browser/ui/cocoa/toolbar/toolbar_controller.mm
index 31b1b2f493cd95f858a43b1abef22d41181bb92f..1e0b74e89e99ad7d7e95a7b3ad42987ef949c401 100644
--- a/chrome/browser/ui/cocoa/toolbar/toolbar_controller.mm
+++ b/chrome/browser/ui/cocoa/toolbar/toolbar_controller.mm
@@ -81,6 +81,10 @@ const NSTimeInterval kToolBarAnimationDuration = 0.12;
 // The height of the location bar in Material Design.
 const CGFloat kMaterialDesignLocationBarHeight = 28;
 
+// The padding between the top of the toolbar and the top of the
+// location bar.
+const CGFloat kMaterialDesignLocationBarPadding = 2;
+
 // The padding between Material Design elements and the edges of the toolbar.
 const CGFloat kMaterialDesignElementPadding = 4;
 
@@ -308,8 +312,7 @@ class NotificationBridge : public AppMenuBadgeController::Delegate {
     backButtonFrame.origin.x =
         kMaterialDesignElementPadding + kMaterialDesignButtonInset;
     backButtonFrame.origin.y = NSMaxY(toolbarBounds) -
-        kMaterialDesignElementPadding - kMaterialDesignButtonInset -
-            toolbarButtonSize.height;
+        kMaterialDesignElementPadding - toolbarButtonSize.height;
     backButtonFrame.size = toolbarButtonSize;
     [backButton_ setFrame:backButtonFrame];
 
@@ -361,7 +364,7 @@ class NotificationBridge : public AppMenuBadgeController::Delegate {
     locationBarFrame.origin.x = NSMaxX(homeButtonFrame) +
         kMaterialDesignButtonInset;
     locationBarFrame.origin.y = NSMaxY(toolbarBounds) -
-        kMaterialDesignElementPadding - kMaterialDesignLocationBarHeight;
+        kMaterialDesignLocationBarPadding - kMaterialDesignLocationBarHeight;
     locationBarFrame.size.width =
         menuButtonFrame.origin.x -
             locationBarFrame.origin.x;