Fix regression in inactive tab drawing (Mac).

chrome/browser/ui/cocoa/tabs/tab_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.
 
 #import "chrome/browser/ui/cocoa/tabs/tab_view.h"
 
 #include "base/i18n/rtl.h"
 #include "base/logging.h"
 #include "base/mac/sdk_forward_declarations.h"
 #include "base/strings/sys_string_conversions.h"
@@ skipping 89 matching lines @@
 }
 
 ui::ThreePartImage& GetMaskImage() {
   CR_DEFINE_STATIC_LOCAL(ui::ThreePartImage, mask,
       (imageForResourceID(IDR_TAB_ALPHA_LEFT), nullptr,
           imageForResourceID(IDR_TAB_ALPHA_RIGHT)));
 
   return mask;
 }
 
-ui::ThreePartImage& GetStrokeImage() {
+ui::ThreePartImage& GetStrokeImage(bool active) {
+  if (!ui::MaterialDesignController::IsModeMaterial() && !active) {
+    CR_DEFINE_STATIC_LOCAL(
+        ui::ThreePartImage, inactiveStroke,
+            (imageForResourceID(IDR_TAB_INACTIVE_LEFT),
+             imageForResourceID(IDR_TAB_INACTIVE_CENTER),
+             imageForResourceID(IDR_TAB_INACTIVE_RIGHT)));
+    return inactiveStroke;
+  }
   CR_DEFINE_STATIC_LOCAL(
       ui::ThreePartImage, stroke,
           (imageForResourceID(IDR_TAB_ACTIVE_LEFT),
            imageForResourceID(IDR_TAB_ACTIVE_CENTER),
            imageForResourceID(IDR_TAB_ACTIVE_RIGHT)));
 
   return stroke;
 }
 
 CGFloat LineWidthFromContext(CGContextRef context) {
@@ skipping 349 matching lines @@
   NSRect bounds = [self bounds];
   if (ui::MaterialDesignController::IsModeMaterial()) {
     // In Material Design the tab strip separator is always 1 pixel high -
     // add a clip rect to avoid drawing the tab edge over it.
     NSRect clipRect = bounds;
     clipRect.origin.y += [self cr_lineWidth];
     NSRectClip(clipRect);
     // In MD, the tab stroke is always opaque.
     alpha = 1;
   }
-  GetStrokeImage().DrawInRect(bounds, NSCompositeSourceOver, alpha);
+  GetStrokeImage(state_ == NSOnState)
+      .DrawInRect(bounds, NSCompositeSourceOver, alpha);
 }
 
 - (void)drawRect:(NSRect)dirtyRect {
   [self drawFill:dirtyRect];
   [self drawStroke:dirtyRect];
 
   // We draw the title string directly instead of using a NSTextField subview.
   // This is so that we can get font smoothing to work on earlier OS, and even
   // when the tab background is a pattern image (when using themes).
   if (![titleView_ isHidden]) {
@@ skipping 437 matching lines @@
   NSAffineTransform* transform = [NSAffineTransform transform];
   [transform scaleXBy:-1 yBy:1];
   [transform translateXBy:-17.5 yBy:-0.25];
   [bezierPath transformUsingAffineTransform:transform];
 
   [[NSColor whiteColor] set];
   [bezierPath fill];
 }
 
 @end  // @implementation TabView(MaterialDesign)