Add SetProminent() to MdTextButton to create blue buttons.

ui/native_theme/common_theme.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 "ui/native_theme/common_theme.h"
 
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "ui/base/material_design/material_design_controller.h"
@@ skipping 141 matching lines @@
   static const SkColor kButtonEnabledColor = SkColorSetRGB(0x22, 0x22, 0x22);
   static const SkColor kButtonHighlightColor = SkColorSetRGB(0, 0, 0);
   static const SkColor kButtonHoverColor = kButtonEnabledColor;
   static const SkColor kButtonHoverBackgroundColor =
       SkColorSetRGB(0xEA, 0xEA, 0xEA);
   static const SkColor kBlueButtonEnabledColor = SK_ColorWHITE;
   static const SkColor kBlueButtonDisabledColor = SK_ColorWHITE;
   static const SkColor kBlueButtonPressedColor = SK_ColorWHITE;
   static const SkColor kBlueButtonHoverColor = SK_ColorWHITE;
   static const SkColor kBlueButtonShadowColor = SkColorSetRGB(0x53, 0x8C, 0xEA);
-  static const SkColor kCallToActionColor = gfx::kGoogleBlue500;
-  static const SkColor kTextOnCallToActionColor = SK_ColorWHITE;
+  static const SkColor kProminentButtonColor = gfx::kGoogleBlue500;
+  static const SkColor kTextOnProminentButtonColor = SK_ColorWHITE;

[sky, 2016/09/27 17:38:32]

generally the 'Text' qualifier is later in the constant, e.g. kTooltipTextColor,
kColorId_ResultsTableSelectedText. How about kProminentButtonTextColor?

[shrike, 2016/09/27 17:52:51]

kProminentButtonTextColor is good. The convention wasn't clear (given that
kTextOnCallToActionColor was OKed), so I wasn't sure how people felt about
kProminentButtonTextColor. I have made this change.

   static const SkColor kButtonPressedShade = SK_ColorTRANSPARENT;
   // MenuItem:
   static const SkColor kMenuBackgroundColor = SK_ColorWHITE;
   static const SkColor kMenuHighlightBackgroundColor =
       SkColorSetRGB(0x42, 0x81, 0xF4);
   static const SkColor kMenuBorderColor = SkColorSetRGB(0xBA, 0xBA, 0xBA);
   static const SkColor kEnabledMenuButtonBorderColor =
       SkColorSetARGB(0x24, 0x00, 0x00, 0x00);
   static const SkColor kFocusedMenuButtonBorderColor =
       SkColorSetARGB(0x48, 0x00, 0x00, 0x00);
@@ skipping 113 matching lines @@
     case NativeTheme::kColorId_BlueButtonEnabledColor:
       return kBlueButtonEnabledColor;
     case NativeTheme::kColorId_BlueButtonDisabledColor:
       return kBlueButtonDisabledColor;
     case NativeTheme::kColorId_BlueButtonPressedColor:
       return kBlueButtonPressedColor;
     case NativeTheme::kColorId_BlueButtonHoverColor:
       return kBlueButtonHoverColor;
     case NativeTheme::kColorId_BlueButtonShadowColor:
       return kBlueButtonShadowColor;
-    case NativeTheme::kColorId_CallToActionColor:
-      return kCallToActionColor;
-    case NativeTheme::kColorId_TextOnCallToActionColor:
-      return kTextOnCallToActionColor;
+    case NativeTheme::kColorId_ProminentButtonColor:
+      return kProminentButtonColor;
+    case NativeTheme::kColorId_TextOnProminentButtonColor:
+      return kTextOnProminentButtonColor;
     case NativeTheme::kColorId_ButtonPressedShade:
       return kButtonPressedShade;
 
     // MenuItem
     case NativeTheme::kColorId_MenuBorderColor:
       return kMenuBorderColor;
     case NativeTheme::kColorId_EnabledMenuButtonBorderColor:
       return kEnabledMenuButtonBorderColor;
     case NativeTheme::kColorId_FocusedMenuButtonBorderColor:
       return kFocusedMenuButtonBorderColor;
@@ skipping 167 matching lines @@
   }
   if (menu_item.corner_radius > 0) {
     const SkScalar radius = SkIntToScalar(menu_item.corner_radius);
     canvas->drawRoundRect(gfx::RectToSkRect(rect), radius, radius, paint);
     return;
   }
   canvas->drawRect(gfx::RectToSkRect(rect), paint);
 }
 
 }  // namespace ui