Move infobar constants and the code that uses them from components/ to chrome/.

chrome/browser/ui/cocoa/infobars/infobar_gradient_view.mm

Index: chrome/browser/ui/cocoa/infobars/infobar_gradient_view.mm
diff --git a/chrome/browser/ui/cocoa/infobars/infobar_gradient_view.mm b/chrome/browser/ui/cocoa/infobars/infobar_gradient_view.mm
index 0e58c157ecde893750f79a8801c2007e83ab2ad6..0f737f03c07fc3fa4b5c975cb10da06f4582a953 100644
--- a/chrome/browser/ui/cocoa/infobars/infobar_gradient_view.mm
+++ b/chrome/browser/ui/cocoa/infobars/infobar_gradient_view.mm
@@ -10,6 +10,7 @@
 #import "chrome/browser/ui/cocoa/infobars/infobar_container_controller.h"
 #import "chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.h"
 #import "chrome/browser/ui/cocoa/themed_window.h"
+#include "chrome/browser/ui/infobar_container_delegate.h"
 #include "components/infobars/core/infobar.h"
 #include "skia/ext/skia_utils_mac.h"
 #import "ui/base/cocoa/nsview_additions.h"
@@ -58,7 +59,7 @@
 
 - (void)drawRect:(NSRect)rect {
   NSRect bounds = [self bounds];
-  bounds.size.height = infobars::InfoBar::kDefaultBarTargetHeight;
+  bounds.size.height = InfoBarContainerDelegate::kDefaultBarTargetHeight;
 
   CGFloat tipXOffset = arrowX_ - arrowHalfWidth_;