[Mac] Update location bar colors when change themes in Material Design.

chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_editor.mm

 // Copyright (c) 2011 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/location_bar/autocomplete_text_field_editor.h"
 
 #include "base/strings/string_util.h"
 #include "base/strings/sys_string_conversions.h"
 #include "chrome/app/chrome_command_ids.h"  // IDC_*
 #include "chrome/browser/themes/theme_service.h"
@@ skipping 51 matching lines @@
     // selectively enable them via context menu, but that submenu is not enabled
     // for the omnibox. The substitutions are unlikely to be useful in any case.
     //
     // Also see http://crbug.com/173405 and http://crbug.com/528014.
     NSTextCheckingTypes checkingTypes = 0;
     [self setEnabledTextCheckingTypes:checkingTypes];
   }
   return self;
 }
 
+- (void)updateColorsToMatchTheme {
+  if (![[self window] inIncognitoMode]) {
+    return;
+  }
+
+  bool inDarkMode = [[self window] inIncognitoModeWithSystemTheme];
+  // Draw a light insertion point for MD Incognito.
+  NSColor* insertionPointColor =
+      inDarkMode ? [NSColor colorWithCalibratedWhite:1 alpha:0.75]
+                 : [NSColor blackColor];
+  [self setInsertionPointColor:insertionPointColor];
+
+  NSColor* textSelectionColor = [NSColor selectedTextBackgroundColor];
+  if (inDarkMode) {
+    // In MD Incognito the text is light gray against a dark background. When
+    // selected, the light gray text against the selection color is illegible.
+    // Rather than tweak or change the selection color, make the text black when
+    // selected.
+    [self setSelectedTextAttributes:@{
+      NSForegroundColorAttributeName : [NSColor blackColor],
+      NSBackgroundColorAttributeName : textSelectionColor
+    }];
+  } else {
+    [self setSelectedTextAttributes:@{
+      NSBackgroundColorAttributeName : textSelectionColor
+    }];
+  }
+}
+
 - (void)viewDidMoveToWindow {
   // Only care about landing in a window when in Material Design mode.
-  if (![self window] || !ui::MaterialDesignController::IsModeMaterial()) {
-    return;
+  if ([self window] && ui::MaterialDesignController::IsModeMaterial()) {
+    [self updateColorsToMatchTheme];
   }
-
-  // Only care about Incognito mode with a non-custom theme.
-  if (![[self window] inIncognitoModeWithSystemTheme]) {
-    return;
-  }
-
-  // Draw a light insertion point for MD Incognito.
-  [self setInsertionPointColor:
-      [NSColor colorWithCalibratedWhite:1 alpha:0.75]];
-  // In MD Incognito the text is light gray against a dark background. When
-  // selected, the light gray text against the selection color is illegible.
-  // Rather than tweak or change the selection color, make the text black when
-  // selected.
-  NSColor* textSelectionColor = [NSColor selectedTextBackgroundColor];
-  [self setSelectedTextAttributes:@{
-    NSForegroundColorAttributeName : [NSColor blackColor],
-    NSBackgroundColorAttributeName : textSelectionColor
-  }];
 }
 
 // If the entire field is selected, drag the same data as would be
 // dragged from the field's location icon.  In some cases the textual
 // contents will not contain relevant data (for instance, "http://" is
 // stripped from URLs).
 - (BOOL)dragSelectionWithEvent:(NSEvent *)event
                         offset:(NSSize)mouseOffset
                      slideBack:(BOOL)slideBack {
   AutocompleteTextFieldObserver* observer = [self observer];
@@ skipping 458 matching lines @@
       [self textStorage],
       [[self delegate] suggestText],
       [[self delegate] suggestColor],
       self,
       [self bounds]);
   AutocompleteTextFieldObserver* observer = [self observer];
   if (observer)
     observer->OnDidDrawRect();
 }
 
+// ThemedWindowDrawing implementation.
+
+- (void)windowDidChangeTheme {
+  if (!ui::MaterialDesignController::IsModeMaterial()) {
+    return;
+  }
+  [self updateColorsToMatchTheme];
+}
+
+- (void)windowDidChangeActive {
+}
+
 @end