Remove sundry IsModeMaterial checks.

chrome/browser/ui/libgtk2ui/gtk2_ui.h

Index: chrome/browser/ui/libgtk2ui/gtk2_ui.h
diff --git a/chrome/browser/ui/libgtk2ui/gtk2_ui.h b/chrome/browser/ui/libgtk2ui/gtk2_ui.h
index 526a85d2502b0fa2964aa3a533da92344d02ed2d..14422d09516c851ef556f5b29ce322178ba32419 100644
--- a/chrome/browser/ui/libgtk2ui/gtk2_ui.h
+++ b/chrome/browser/ui/libgtk2ui/gtk2_ui.h
@@ -68,9 +68,6 @@ class Gtk2UI : public views::LinuxUI {
 
   // ui::LinuxUI:
   void Initialize() override;
-  // TODO(varkha): This should not be necessary once Material Design is on
-  // unconditionally.
-  void MaterialDesignControllerReady() override;
   bool GetTint(int id, color_utils::HSL* tint) const override;
   bool GetColor(int id, SkColor* color) const override;
   SkColor GetFocusRingColor() const override;
@@ -128,11 +125,6 @@ class Gtk2UI : public views::LinuxUI {
   // Initialize the Xcursor theme and size with the GTK theme and size.
   void LoadCursorTheme();
 
-  // Updates colors if necessary after possible modification of command line.
-  // TODO(varkha): This should not be necessary once Material Design is on
-  // unconditionally.
-  void UpdateMaterialDesignColors();
-
   // Reads in explicit theme frame colors from the ChromeGtkFrame style class
   // or generates them per our fallback algorithm.
   void BuildFrameColors();