cocoa browser: remove remaining non-MD code

chrome/browser/ui/cocoa/framed_browser_window.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.
 
 #import "chrome/browser/ui/cocoa/framed_browser_window.h"
 
 #include <stddef.h>
 
 #include "base/logging.h"
 #include "base/mac/sdk_forward_declarations.h"
@@ skipping 258 matching lines @@
     else if (active && !incognito)
       themeImageID = IDR_THEME_FRAME;
     else if (!active && incognito)
       themeImageID = IDR_THEME_FRAME_INCOGNITO_INACTIVE;
     else
       themeImageID = IDR_THEME_FRAME_INACTIVE;
     if (themeProvider->HasCustomImage(IDR_THEME_FRAME))
       themeImageColor = themeProvider->GetNSImageColorNamed(themeImageID);
   }
 
-  // If not Material Design, use a gradient if Incognito and no theme image.
-  NSGradient* gradient = nil;
-  if (!ui::MaterialDesignController::IsModeMaterial() &&
-      !themeImageColor && incognito)
-    gradient = themeProvider->GetNSGradient(
-        active ? ThemeProperties::GRADIENT_FRAME_INCOGNITO :
-                 ThemeProperties::GRADIENT_FRAME_INCOGNITO_INACTIVE);
-
   BOOL themed = NO;
   if (themeImageColor) {
     // Default to replacing any existing pixels with the theme image, but if
     // asked paint black first and blend the theme with black.
     NSCompositingOperation operation = NSCompositeCopy;
     if (forceBlackBackground) {
       [[NSColor blackColor] set];
       NSRectFill(dirtyRect);
       operation = NSCompositeSourceOver;
     }
 
     NSPoint position = [[view window] themeImagePositionForAlignment:
         THEME_IMAGE_ALIGN_WITH_FRAME];
     [[NSGraphicsContext currentContext] cr_setPatternPhase:position
                                                    forView:view];
 
     [themeImageColor set];
     NSRectFillUsingOperation(dirtyRect, operation);
     themed = YES;
-  } else if (gradient) {
-    NSPoint startPoint = NSMakePoint(NSMinX(bounds), NSMaxY(bounds));
-    NSPoint endPoint = startPoint;
-    endPoint.y -= kBrowserFrameViewPaintHeight;
-    [gradient drawFromPoint:startPoint toPoint:endPoint options:0];
-    themed = YES;
   }
 
   // Check to see if we have an overlay image.
   NSImage* overlayImage = nil;
   if (themeProvider->HasCustomImage(IDR_THEME_FRAME_OVERLAY) && !incognito &&
       !popup) {
     overlayImage = themeProvider->
         GetNSImageNamed(active ? IDR_THEME_FRAME_OVERLAY :
                                  IDR_THEME_FRAME_OVERLAY_INACTIVE);
   }
@@ skipping 40 matching lines @@
   [self childWindowsDidChange];
 }
 
 - (void)childWindowsDidChange {
   id delegate = [self delegate];
   if ([delegate respondsToSelector:@selector(childWindowsDidChange)])
     [delegate childWindowsDidChange];
 }
 
 @end