Remove color arg from DidChangeThemeColor().

This isn't actually used except by tests, which can be rewritten to not need it.

Bug: none
Change-Id: Ia9f5957f161aea8bb57625729a14e1d214660ec1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1982623
Reviewed-by: Alan Cutter <[email protected]>
Reviewed-by: Avi Drissman <[email protected]>
Reviewed-by: Yaron Friedman <[email protected]>
Commit-Queue: Peter Kasting <[email protected]>
Cr-Commit-Position: refs/heads/master@{#728698}
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index 3eac125..7074ec7 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -4637,7 +4637,7 @@
   if (source->did_first_visually_non_empty_paint() &&
       last_sent_theme_color_ != source->theme_color()) {
     for (auto& observer : observers_)
-      observer.DidChangeThemeColor(source->theme_color());
+      observer.DidChangeThemeColor();
     last_sent_theme_color_ = source->theme_color();
   }
 }
@@ -5139,7 +5139,7 @@
   if (source->theme_color() != last_sent_theme_color_) {
     // Theme color should have updated by now if there was one.
     for (auto& observer : observers_)
-      observer.DidChangeThemeColor(source->theme_color());
+      observer.DidChangeThemeColor();
     last_sent_theme_color_ = source->theme_color();
   }
 }