Move GetPrintHandler to CefClient (see issue #2196)

This new location is preferred because we now know the associated CefBrowser
for all CefPrintHandler callbacks.

tests/cefclient/browser/client_app_delegates_browser.cc

@@ -6,10 +6,6 @@
 
 #include "tests/cefclient/browser/client_browser.h"
 
-#if defined(OS_LINUX)
-#include "tests/cefclient/browser/print_handler_gtk.h"
-#endif
-
 namespace client {
 
 // static
@@ -17,13 +13,4 @@ void ClientAppBrowser::CreateDelegates(DelegateSet& delegates) {
   browser::CreateDelegates(delegates);
 }
 
-// static
-CefRefPtr<CefPrintHandler> ClientAppBrowser::CreatePrintHandler() {
-#if defined(OS_LINUX)
-  return new ClientPrintHandlerGtk();
-#else
-  return nullptr;
-#endif
-}
-
 }  // namespace client