GTK: First draft of using native themes, partially based on evan's CL 118358.

chrome/browser/gtk/find_bar_gtk.cc

Index: chrome/browser/gtk/find_bar_gtk.cc
diff --git a/chrome/browser/gtk/find_bar_gtk.cc b/chrome/browser/gtk/find_bar_gtk.cc
index e8e70d3ae22660db180ba4bf5d2ae6ba74d60c6a..54fe2402b54f1a838841013aedf153975114d05d 100644
--- a/chrome/browser/gtk/find_bar_gtk.cc
+++ b/chrome/browser/gtk/find_bar_gtk.cc
@@ -163,7 +163,8 @@ void FindBarGtk::InitWidgets() {
       l10n_util::GetStringUTF8(IDS_FIND_IN_PAGE_CLOSE_TOOLTIP).c_str());
 
   find_next_button_.reset(new CustomDrawButton(IDR_FINDINPAGE_NEXT,
-      IDR_FINDINPAGE_NEXT_H, IDR_FINDINPAGE_NEXT_H, IDR_FINDINPAGE_NEXT_P));
+      IDR_FINDINPAGE_NEXT_H, IDR_FINDINPAGE_NEXT_H, IDR_FINDINPAGE_NEXT_P,
+      NULL));
   g_signal_connect(G_OBJECT(find_next_button_->widget()), "clicked",
                    G_CALLBACK(OnClicked), this);
   gtk_widget_set_tooltip_text(find_next_button_->widget(),
@@ -172,7 +173,8 @@ void FindBarGtk::InitWidgets() {
                    FALSE, FALSE, 0);
 
   find_previous_button_.reset(new CustomDrawButton(IDR_FINDINPAGE_PREV,
-      IDR_FINDINPAGE_PREV_H, IDR_FINDINPAGE_PREV_H, IDR_FINDINPAGE_PREV_P));
+      IDR_FINDINPAGE_PREV_H, IDR_FINDINPAGE_PREV_H, IDR_FINDINPAGE_PREV_P,
+      NULL));
   g_signal_connect(G_OBJECT(find_previous_button_->widget()), "clicked",
                    G_CALLBACK(OnClicked), this);
   gtk_widget_set_tooltip_text(find_previous_button_->widget(),