[Win, Linux] Always display the avatar button text at the same size.

chrome/browser/ui/views/profiles/new_avatar_button.cc

Index: chrome/browser/ui/views/profiles/new_avatar_button.cc
diff --git a/chrome/browser/ui/views/profiles/new_avatar_button.cc b/chrome/browser/ui/views/profiles/new_avatar_button.cc
index b30f7746c14875f19ed2dd473537e3eb1322e347..2e3647c1048c58ac38e75dc08ce4293267778971 100644
--- a/chrome/browser/ui/views/profiles/new_avatar_button.cc
+++ b/chrome/browser/ui/views/profiles/new_avatar_button.cc
@@ -61,6 +61,12 @@ NewAvatarButton::NewAvatarButton(
       gfx::ShadowValue(gfx::Point(), 1.0f, SK_ColorDKGRAY)));
   SetTextSubpixelRenderingEnabled(false);
 
+  // The largest text height that fits in the button. If the font list height
+  // is larger than this, it will be shrunk to match it.
+  // TODO(noms): Calculate this constant algorithmically.
+  const int kDisplayFontHeight = 15;
+  SetFontList(GetFontList().DeriveWithHeightUpperBound(kDisplayFontHeight));
+
   ui::ResourceBundle* rb = &ui::ResourceBundle::GetSharedInstance();
   if (button_style == THEMED_BUTTON) {
     const int kNormalImageSet[] = IMAGE_GRID(IDR_AVATAR_THEMED_BUTTON_NORMAL);