Make toolbar color opaque in browser theme

chrome/browser/themes/browser_theme_pack.cc

Index: chrome/browser/themes/browser_theme_pack.cc
diff --git a/chrome/browser/themes/browser_theme_pack.cc b/chrome/browser/themes/browser_theme_pack.cc
index 70e81a834842847ff7612a322891752d73e20f6c..59a1b7fd2e6e66e0ce75ee3e0aac04362f677613 100644
--- a/chrome/browser/themes/browser_theme_pack.cc
+++ b/chrome/browser/themes/browser_theme_pack.cc
@@ -790,6 +790,10 @@ bool BrowserThemePack::GetColor(int id, SkColor* color) const {
     for (size_t i = 0; i < kColorTableLength; ++i) {
       if (colors_[i].id == id) {
         *color = colors_[i].color;
+        // The theme provider is intentionally made to ignore alpha for toolbar
+        // color, as we don't want to allow transparent toolbars.
+        if (id == ThemeProperties::COLOR_TOOLBAR)
+          *color = SkColorSetA(*color, SK_AlphaOPAQUE);
         return true;
       }
     }