cocoa browser: remove remaining non-MD code

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

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/cocoa/infobars/infobar_gradient_view.h"
 
 #include "base/mac/scoped_nsobject.h"
 #import "chrome/browser/themes/theme_properties.h"
 #import "chrome/browser/ui/cocoa/browser_window_controller.h"
 #import "chrome/browser/ui/cocoa/infobars/infobar_container_controller.h"
@@ skipping 42 matching lines @@
     return [NSColor blackColor];
 
   BOOL active = [[self window] isMainWindow];
   return themeProvider->GetNSColor(
       active ? ThemeProperties::COLOR_TOOLBAR_STROKE :
                ThemeProperties::COLOR_TOOLBAR_STROKE_INACTIVE);
 }
 
 - (void)drawRect:(NSRect)rect {
   NSRect bounds = [self bounds];
-  if (ui::MaterialDesignController::IsModeMaterial()) {
-    bounds.size.height = InfoBarContainerDelegate::kDefaultBarTargetHeightMd;
-  } else {
-    bounds.size.height = InfoBarContainerDelegate::kDefaultBarTargetHeight;
-  }
+  bounds.size.height = InfoBarContainerDelegate::kDefaultBarTargetHeightMd;
   CGFloat tipXOffset = arrowX_ - arrowHalfWidth_;
 
   // Around the bounds of the infobar, continue drawing the path into which the
   // gradient will be drawn.
   NSBezierPath* infoBarPath = [NSBezierPath bezierPath];
   [infoBarPath moveToPoint:NSMakePoint(NSMinX(bounds), NSMaxY(bounds))];
 
   // Draw the tip.
   if (hasTip_) {
     [infoBarPath lineToPoint:NSMakePoint(tipXOffset, NSMaxY(bounds))];
@@ skipping 63 matching lines @@
 }
 
 - (void)setHasTip:(BOOL)hasTip {
   if (hasTip_ == hasTip)
     return;
   hasTip_ = hasTip;
   [self setNeedsDisplay:YES];
 }
 
 @end