Select theme resources from ResourceBundle at requested scale factor.

chrome/browser/ui/webui/theme_source.h

Index: chrome/browser/ui/webui/theme_source.h
diff --git a/chrome/browser/ui/webui/theme_source.h b/chrome/browser/ui/webui/theme_source.h
index 9e6c30efbb2b7cd3c1b18a1390136e6d60ceb422..5b58d1c13e12bc818fc86bbf8775c1cfefa2a5ce 100644
--- a/chrome/browser/ui/webui/theme_source.h
+++ b/chrome/browser/ui/webui/theme_source.h
@@ -9,6 +9,7 @@
 #include <string>
 
 #include "chrome/browser/ui/webui/chrome_url_data_manager.h"
+#include "ui/base/layout.h"
 
 class Profile;
 
@@ -38,7 +39,9 @@ class ThemeSource : public ChromeURLDataManager::DataSource {
 
  private:
   // Fetch and send the theme bitmap.
-  void SendThemeBitmap(int request_id, int resource_id);
+  void SendThemeBitmap(int request_id,
+                       int resource_id,
+                       ui::ScaleFactor scale_factor);
 
   // The original profile (never an OTR profile).
   Profile* profile_;