Add a way to fetch window frame metrics from NativeShellWindow

chrome/browser/ui/gtk/extensions/shell_window_gtk.cc

Index: chrome/browser/ui/gtk/extensions/shell_window_gtk.cc
diff --git a/chrome/browser/ui/gtk/extensions/shell_window_gtk.cc b/chrome/browser/ui/gtk/extensions/shell_window_gtk.cc
index 32e7c73c4abadf0df0a98560c0095a26ea7bd0b8..272482767c7e56b4533e2136c4b34179096764e1 100644
--- a/chrome/browser/ui/gtk/extensions/shell_window_gtk.cc
+++ b/chrome/browser/ui/gtk/extensions/shell_window_gtk.cc
@@ -227,6 +227,18 @@ bool ShellWindowGtk::IsAlwaysOnTop() const {
   return false;
 }
 
+gfx::Rect ShellWindowGtk::ContentBoundsForWindowBounds(
+    const gfx::Rect& window_bounds) const {
+  // TODO(jeremya): implement.
+  return window_bounds;
+}
+
+gfx::Rect ShellWindowGtk::WindowBoundsForContentBounds(
+    const gfx::Rect& content_bounds) const {
+  // TODO(jeremya): implement.
+  return content_bounds;
+}
+
 void ShellWindowGtk::ActiveWindowChanged(GdkWindow* active_window) {
   // Do nothing if we're in the process of closing the browser window.
   if (!window_)