Implement first part of supporting global extension commands.

chrome/browser/extensions/global_shortcut_listener_gtk.cc

Index: chrome/browser/extensions/global_shortcut_listener_gtk.cc
diff --git a/chrome/browser/extensions/global_shortcut_listener_gtk.cc b/chrome/browser/extensions/global_shortcut_listener_gtk.cc
new file mode 100644
index 0000000000000000000000000000000000000000..bfb00ced6cb6f17fc29b1a2ecf62df867e1dfba5
--- /dev/null
+++ b/chrome/browser/extensions/global_shortcut_listener_gtk.cc
@@ -0,0 +1,75 @@
+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/extensions/global_shortcut_listener_gtk.h"
+
+#include "content/public/browser/browser_thread.h"
+
+using content::BrowserThread;
+
+namespace {
+
+static base::LazyInstance<extensions::GlobalShortcutListenerGtk> instance =
+    LAZY_INSTANCE_INITIALIZER;
+
+}  // namespace
+
+namespace extensions {
+
+// static
+GlobalShortcutListener* GlobalShortcutListener::GetInstance() {
+  CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  return instance.Pointer();
+}
+
+GlobalShortcutListenerGtk::GlobalShortcutListenerGtk()
+    : is_listening_(false) {
+  CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  // TODO(implementor): Remove this.
+  LOG(ERROR) << "GlobalShortcutListenerGtk object created";
+}
+
+GlobalShortcutListenerGtk::~GlobalShortcutListenerGtk() {
+  if (is_listening_)
+    StopListening();
+}
+
+void GlobalShortcutListenerGtk::StartListening() {
+  DCHECK(!is_listening_);  // Don't start twice.
+  NOTIMPLEMENTED();
+  is_listening_ = true;
+}
+
+void GlobalShortcutListenerGtk::StopListening() {
+  DCHECK(is_listening_);  // No point if we are not already listening.
+  NOTIMPLEMENTED();
+  is_listening_ = false;
+}
+
+void GlobalShortcutListenerGtk::RegisterAccelerator(
+    const ui::Accelerator& accelerator,
+    GlobalShortcutListener::Observer* observer) {
+  NOTIMPLEMENTED();
+  // To implement:
+  // 1) Convert modifiers to platform specific modifiers.
+  // 2) Register for the hotkey.
+  // 3) If not successful, log why.
+  // 4) Else, call base class RegisterAccelerator.
+
+  GlobalShortcutListener::RegisterAccelerator(accelerator, observer);
+}
+
+void GlobalShortcutListenerGtk::UnregisterAccelerator(
+    const ui::Accelerator& accelerator,
+    GlobalShortcutListener::Observer* observer) {
+  NOTIMPLEMENTED();
+  // To implement:
+  // 1) Unregister for the hotkey.
+  // 2) Call base class UnregisterAccelerator.
+
+  GlobalShortcutListener::UnregisterAccelerator(accelerator, observer);
+}
+
+}  // namespace extensions