[color] Add tab strip material color mixer

This CL adds an initial color mixer for tab strip colors. Follow up work
will be needed to correctly address various state colors.

Bug: 1399942
Change-Id: Ief283791c26422d383befb137ddb44356ae574e1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4347396
Commit-Queue: Thomas Lukaszewicz <tluk@chromium.org>
Reviewed-by: Allen Bauer <kylixrd@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1118527}

chrome/browser/ui/color/BUILD.gn

@@ -23,6 +23,8 @@ source_set("mixers") {
     "chrome_color_provider_utils.h",
     "material_side_panel_color_mixer.cc",
     "material_side_panel_color_mixer.h",
+    "material_tab_strip_color_mixer.cc",
+    "material_tab_strip_color_mixer.h",
     "native_chrome_color_mixer.cc",
     "native_chrome_color_mixer.h",
     "new_tab_page_color_mixer.cc",

chrome/browser/ui/color/chrome_color_mixers.cc

@@ -13,6 +13,7 @@
 #include "chrome/browser/ui/color/chrome_color_id.h"
 #include "chrome/browser/ui/color/chrome_color_mixer.h"
 #include "chrome/browser/ui/color/material_side_panel_color_mixer.h"
+#include "chrome/browser/ui/color/material_tab_strip_color_mixer.h"
 #include "chrome/browser/ui/color/native_chrome_color_mixer.h"
 #include "chrome/browser/ui/color/new_tab_page_color_mixer.h"
 #include "chrome/browser/ui/color/omnibox_color_mixer.h"
@@ -63,6 +64,7 @@ void AddChromeColorMixers(ui::ColorProvider* provider,
 
   if (features::IsChromeRefresh2023()) {
     AddMaterialSidePanelColorMixer(provider, key);
+    AddMaterialTabStripColorMixer(provider, key);
   }
 
   // Must be the last one in order to override other mixer colors.

chrome/browser/ui/color/material_tab_strip_color_mixer.cc

@@ -0,0 +1,32 @@
+// Copyright 2023 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/ui/color/material_tab_strip_color_mixer.h"
+
+#include "chrome/browser/ui/color/chrome_color_id.h"
+#include "ui/color/color_id.h"
+#include "ui/color/color_mixer.h"
+#include "ui/color/color_provider.h"
+#include "ui/color/color_recipe.h"
+
+void AddMaterialTabStripColorMixer(ui::ColorProvider* provider,
+                                   const ui::ColorProviderManager::Key& key) {
+  ui::ColorMixer& mixer = provider->AddMixer();
+
+  // TODO(crbug.com/1399942): Validate final mappings for Gm3 color.
+  mixer[kColorTabBackgroundActiveFrameActive] = {ui::kColorSysBase};
+  mixer[kColorTabBackgroundActiveFrameInactive] = {
+      kColorTabBackgroundActiveFrameActive};
+  mixer[kColorTabBackgroundInactiveFrameActive] = {ui::kColorSysHeader};
+  mixer[kColorTabBackgroundInactiveFrameInactive] = {
+      ui::kColorSysHeaderInactive};
+
+  mixer[kColorTabForegroundActiveFrameActive] = {ui::kColorSysOnSurface};
+  mixer[kColorTabForegroundActiveFrameInactive] = {
+      kColorTabForegroundActiveFrameActive};
+  mixer[kColorTabForegroundInactiveFrameActive] = {
+      ui::kColorSysOnSurfaceSecondary};
+  mixer[kColorTabForegroundInactiveFrameInactive] = {
+      kColorTabForegroundInactiveFrameActive};
+}

chrome/browser/ui/color/material_tab_strip_color_mixer.h

@@ -0,0 +1,19 @@
+// Copyright 2023 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_UI_COLOR_MATERIAL_TAB_STRIP_COLOR_MIXER_H_
+#define CHROME_BROWSER_UI_COLOR_MATERIAL_TAB_STRIP_COLOR_MIXER_H_
+
+#include "ui/color/color_provider_manager.h"
+
+namespace ui {
+class ColorProvider;
+}
+
+// Adds a color mixer that contains recipes for tab strip colors to `provider`
+// with |key|.
+void AddMaterialTabStripColorMixer(ui::ColorProvider* provider,
+                                   const ui::ColorProviderManager::Key& key);
+
+#endif  // CHROME_BROWSER_UI_COLOR_MATERIAL_TAB_STRIP_COLOR_MIXER_H_