For some vector icons, get the size from the vector definition.

chrome/browser/ui/tabs/tab_utils.cc

Index: chrome/browser/ui/tabs/tab_utils.cc
diff --git a/chrome/browser/ui/tabs/tab_utils.cc b/chrome/browser/ui/tabs/tab_utils.cc
index cd088c401d5cbe7de0950cc2b6b9412044696e16..e0352044f61e1418be29bc38eb45de61c6cd315e 100644
--- a/chrome/browser/ui/tabs/tab_utils.cc
+++ b/chrome/browser/ui/tabs/tab_utils.cc
@@ -169,11 +169,11 @@ gfx::Image GetTabMediaIndicatorImage(TabMediaState media_state,
 #if !defined(OS_MACOSX)
     case TAB_MEDIA_STATE_AUDIO_PLAYING:
     case TAB_MEDIA_STATE_AUDIO_MUTING: {
-      return gfx::Image(
-          gfx::CreateVectorIcon(media_state == TAB_MEDIA_STATE_AUDIO_PLAYING
-                                    ? gfx::VectorIconId::TAB_AUDIO
-                                    : gfx::VectorIconId::TAB_AUDIO_MUTING,
-                                16, button_color));
+      return gfx::Image(gfx::CreatePrimaryVectorIcon(
+          media_state == TAB_MEDIA_STATE_AUDIO_PLAYING
+              ? gfx::VectorIconId::TAB_AUDIO
+              : gfx::VectorIconId::TAB_AUDIO_MUTING,
+          button_color));
     }
 #else
     case TAB_MEDIA_STATE_AUDIO_PLAYING: