Convert //shell/... to use set_connection_error_handler() instead of set_error_handler().

shell/application_manager/shell_impl.h

Index: shell/application_manager/shell_impl.h
diff --git a/shell/application_manager/shell_impl.h b/shell/application_manager/shell_impl.h
index eb3c78a4d2b69700a004390f1da25a336f36f26e..834f08567dce9661f18f01c033c79f659647bc06 100644
--- a/shell/application_manager/shell_impl.h
+++ b/shell/application_manager/shell_impl.h
@@ -17,7 +17,7 @@ namespace shell {
 
 class ApplicationManager;
 
-class ShellImpl : public mojo::Shell, public mojo::ErrorHandler {
+class ShellImpl : public mojo::Shell {
  public:
   ShellImpl(mojo::ApplicationPtr application,
             ApplicationManager* manager,
@@ -44,9 +44,6 @@ class ShellImpl : public mojo::Shell, public mojo::ErrorHandler {
       mojo::InterfaceRequest<mojo::ServiceProvider> services,
       mojo::ServiceProviderPtr exposed_services) override;
 
-  // mojo::ErrorHandler implementation:
-  void OnConnectionError() override;
-
   ApplicationManager* const manager_;
   const Identity identity_;
   base::Closure on_application_end_;