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

chrome/browser/profile.cc

Index: chrome/browser/profile.cc
diff --git a/chrome/browser/profile.cc b/chrome/browser/profile.cc
index 5d0ccecec2d9ff4fea4edf8158365baf0cfb9c6b..0034792cd2c684137000baf7546a5e06e5c5c6aa 100644
--- a/chrome/browser/profile.cc
+++ b/chrome/browser/profile.cc
@@ -45,6 +45,10 @@
 #include "grit/locale_settings.h"
 #include "net/base/force_tls_state.h"
 
+#if defined(OS_LINUX)
+#include "chrome/browser/gtk/gtk_theme_provider.h"
+#endif
+
 using base::Time;
 using base::TimeDelta;
 
@@ -116,6 +120,9 @@ void Profile::RegisterUserPrefs(PrefService* prefs) {
   prefs->RegisterBooleanPref(prefs::kEnableSpellCheck, true);
   prefs->RegisterBooleanPref(prefs::kEnableAutoSpellCorrect, true);
   prefs->RegisterBooleanPref(prefs::kEnableUserScripts, false);
+#if defined(OS_LINUX)
+  prefs->RegisterBooleanPref(prefs::kUsesSystemTheme, false);
+#endif
   prefs->RegisterStringPref(prefs::kCurrentThemeID, L"");
   prefs->RegisterDictionaryPref(prefs::kCurrentThemeImages);
   prefs->RegisterDictionaryPref(prefs::kCurrentThemeColors);
@@ -287,6 +294,10 @@ class OffTheRecordProfileImpl : public Profile,
     GetOriginalProfile()->SetTheme(extension);
   }
 
+  virtual void SetNativeTheme() {
+    GetOriginalProfile()->SetNativeTheme();
+  }
+
   virtual void ClearTheme() {
     GetOriginalProfile()->ClearTheme();
   }
@@ -922,7 +933,11 @@ bool ProfileImpl::HasCreatedDownloadManager() const {
 
 void ProfileImpl::InitThemes() {
   if (!created_theme_provider_) {
+#if defined(OS_LINUX)
+    scoped_refptr<BrowserThemeProvider> themes(new GtkThemeProvider);

[tony, 2009/07/07 19:47:05]

Nit: Maybe make a static ::Create method to avoid this #if?

+#else
     scoped_refptr<BrowserThemeProvider> themes(new BrowserThemeProvider);
+#endif
     themes->Init(this);
     created_theme_provider_ = true;
     theme_provider_.swap(themes);
@@ -934,6 +949,11 @@ void ProfileImpl::SetTheme(Extension* extension) {
   theme_provider_.get()->SetTheme(extension);
 }
 
+void ProfileImpl::SetNativeTheme() {
+  InitThemes();
+  theme_provider_.get()->SetNativeTheme();
+}
+
 void ProfileImpl::ClearTheme() {
   InitThemes();
   theme_provider_.get()->UseDefaultTheme();