Add ability for Widgets to override the DefaultThemeProvider

chrome/browser/ui/views/omnibox/omnibox_popup_contents_view.cc

Index: chrome/browser/ui/views/omnibox/omnibox_popup_contents_view.cc
diff --git a/chrome/browser/ui/views/omnibox/omnibox_popup_contents_view.cc b/chrome/browser/ui/views/omnibox/omnibox_popup_contents_view.cc
index c1694fb8c8f6d7b0450e2d0d96d226b4a1220567..90af0a58a68d254bdfc269938e3ededecf440380 100644
--- a/chrome/browser/ui/views/omnibox/omnibox_popup_contents_view.cc
+++ b/chrome/browser/ui/views/omnibox/omnibox_popup_contents_view.cc
@@ -6,8 +6,11 @@
 
 #include <algorithm>
 
+#include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/search/search.h"
 #include "chrome/browser/themes/theme_properties.h"
+#include "chrome/browser/themes/theme_service.h"
+#include "chrome/browser/themes/theme_service_factory.h"
 #include "chrome/browser/ui/views/location_bar/location_bar_view.h"
 #include "chrome/browser/ui/views/omnibox/omnibox_result_view.h"
 #include "components/omnibox/browser/omnibox_view.h"
@@ -26,6 +29,10 @@
 #include "ui/views/widget/widget.h"
 #include "ui/views/window/non_client_view.h"
 
+#if defined(OS_CHROMEOS)
+#include "chrome/browser/ui/ash/multi_user/multi_user_util.h"
+#endif  // OS_CHROMEOS
+
 class OmniboxPopupContentsView::AutocompletePopupWidget
     : public views::Widget,
       public base::SupportsWeakPtr<AutocompletePopupWidget> {
@@ -247,10 +254,25 @@ void OmniboxPopupContentsView::UpdatePopupAppearance() {
 #else
     views::Widget::InitParams params(views::Widget::InitParams::TYPE_POPUP);
 #endif
+
+    // On login screen and logged in as an anonymous user you might not get a

[oshima, 2015/09/10 00:20:38]

Is it impossible to have omnibox in login screen, isn't it? 

Also, login screen is chromeos specific, so you should move that inside if
defined cros.

+    // profile. Which indicates that multi-user is not active and an anonymous
+    // profile is in use. Take the active profile to find the theme.
+    Profile* profile = nullptr;
+#if defined(OS_CHROMEOS)
+    profile =
+        multi_user_util::GetProfileFromWindow(popup_parent->GetNativeWindow());
+    if (!profile)
+      profile = ProfileManager::GetActiveUserProfile();
+#else
+    profile = ProfileManager::GetActiveUserProfile();
+#endif  // OS_CHROMEOS
+
     params.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW;
     params.parent = popup_parent->GetNativeView();
     params.bounds = GetPopupBounds();
     params.context = popup_parent->GetNativeWindow();
+    params.theme_provider = ThemeServiceFactory::GetForProfile(profile);
     popup_->Init(params);
     // Third-party software such as DigitalPersona identity verification can
     // hook the underlying window creation methods and use SendMessage to