Remove some more OS_CHROMEOS from browser.

BUG=none
TEST=none
Review URL: https://chromiumcodereview.appspot.com/10377114

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@137200 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/ash/shell/shell_delegate_impl.cc b/ash/shell/shell_delegate_impl.cc
index f1d52bb7..7b44eae4 100644
--- a/ash/shell/shell_delegate_impl.cc
+++ b/ash/shell/shell_delegate_impl.cc
@@ -75,6 +75,9 @@
 void ShellDelegateImpl::OpenMobileSetup() {
 }
 
+void ShellDelegateImpl::ShowKeyboardOverlay(ui::AcceleratorTarget* target) {
+}
+
 content::BrowserContext* ShellDelegateImpl::GetCurrentBrowserContext() {
   return Shell::GetInstance()->browser_context();
 }