Rework gfx::Font by moving platform-specific code into inner classes....

app/resource_bundle_dummy.cc

Index: app/resource_bundle_dummy.cc
===================================================================
--- app/resource_bundle_dummy.cc	(revision 55911)
+++ app/resource_bundle_dummy.cc	(working copy)
@@ -9,6 +9,7 @@
 #include "base/lock.h"
 #include "base/logging.h"
 #include "gfx/font.h"
+#include "gfx/platform_font_win.h"
 
 ResourceBundle* ResourceBundle::g_shared_instance_ = NULL;
 
@@ -16,10 +17,13 @@
 // files. The font members of ResourceBundle are never initialized in our code
 // so this destructor is never called.
 namespace gfx {
-  Font::HFontRef::~HFontRef() {
-    NOTREACHED();
-  }
+Font::~Font() {
+  NOTREACHED();
 }
+PlatformFontWin::HFontRef::~HFontRef() {
+  NOTREACHED();
+}
+}
 
 
 /* static */