Use the NativeTheme to create the text color for text during the generated card animation.

chrome/browser/ui/views/autofill/autofill_dialog_views.cc

 // 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/views/autofill/autofill_dialog_views.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/location.h"
@@ skipping 17 matching lines @@
 #include "content/public/browser/web_contents_view.h"
 #include "grit/theme_resources.h"
 #include "grit/ui_resources.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/models/combobox_model.h"
 #include "ui/base/models/menu_model.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/animation/animation_delegate.h"
 #include "ui/gfx/canvas.h"
+#include "ui/gfx/color_utils.h"
 #include "ui/gfx/path.h"
 #include "ui/gfx/point.h"
 #include "ui/gfx/skia_util.h"
 #include "ui/views/background.h"
 #include "ui/views/border.h"
 #include "ui/views/bubble/bubble_border.h"
 #include "ui/views/bubble/bubble_frame_view.h"
 #include "ui/views/controls/button/blue_button.h"
 #include "ui/views/controls/button/checkbox.h"
 #include "ui/views/controls/button/label_button.h"
@@ skipping 523 matching lines @@
   if (!message_view_->visible())
     return 0;
 
   return kOverlayImageBottomMargin +
       views::kButtonVEdgeMarginNew +
       message_view_->GetHeightForWidth(width) +
       image_view_->GetHeightForWidth(width);
 }
 
 void AutofillDialogViews::OverlayView::UpdateState() {
-  const DialogOverlayState& state = delegate_->GetDialogOverlay();
+  const DialogOverlayState& state =
+      delegate_->GetDialogOverlay(GetNativeTheme());
 
   if (state.image.IsEmpty()) {
     SetVisible(false);
     return;
   }
 
   image_view_->SetImage(state.image.ToImageSkia());
 
   message_view_->SetVisible(!state.string.text.empty());
   message_view_->SetText(state.string.text);
@@ skipping 55 matching lines @@
     arrow.moveTo(rect.x() - 1, y);
     arrow.rLineTo(rect.width() / 2 - arrow_half_width, 0);
     arrow.rLineTo(arrow_half_width, -kArrowHeight);
     arrow.rLineTo(arrow_half_width, kArrowHeight);
     arrow.lineTo(rect.right() + 1, y);
     arrow.lineTo(rect.right() + 1, rect.bottom() + 1);
     arrow.lineTo(rect.x() - 1, rect.bottom() + 1);
     arrow.close();
 
     SkPaint paint;
-    paint.setColor(kShadingColor);
+    SkColor background_color = background()->get_color();
+    int background_luminance = color_utils::GetLuminanceForColor(background_color);
+    int background_alpha = static_cast<int>(
+        7 - 15 * (background_luminance - 255) / 255);

[groby-ooo-7-16, 2013/12/10 20:26:49]

So we get a negative alpha for high-luma backgrounds? Doesn't the
BlendTowardOppositeLuminance function already take care of biasing?

[Sheridan Rawlins, 2013/12/10 20:51:56]

No, alpha is always positive - the luminance returned in
color_utils::GetLuminanceForColor is 0..255, but I could just switch it around
and make it positive if that's easier to understand.

BlendTowardOppositeLuminance only takes the direction into account, blending
white into a darker color or black into a lighter color; it doesn't take human
perception/bias into account.

+    int subtle_border_alpha = static_cast<int>(
+        10 - 20 * (background_luminance - 255) / 255);
+
+    paint.setColor(color_utils::BlendTowardOppositeLuminance(
+        background_color, background_alpha));
     paint.setStyle(SkPaint::kFill_Style);
     canvas->DrawPath(arrow, paint);
-    paint.setColor(kSubtleBorderColor);
+    paint.setColor(color_utils::BlendTowardOppositeLuminance(
+        background_color, subtle_border_alpha));
     paint.setStyle(SkPaint::kStroke_Style);
     canvas->DrawPath(arrow, paint);
   }
 
   PaintChildren(canvas);
 }
 
 void AutofillDialogViews::OverlayView::OnNativeThemeChanged(
     const ui::NativeTheme* theme) {
   set_background(views::Background::CreateSolidBackground(
@@ skipping 1778 matching lines @@
 AutofillDialogViews::DetailsGroup::DetailsGroup(DialogSection section)
     : section(section),
       container(NULL),
       manual_input(NULL),
       suggested_info(NULL),
       suggested_button(NULL) {}
 
 AutofillDialogViews::DetailsGroup::~DetailsGroup() {}
 
 }  // namespace autofill