Implement first part of supporting global extension commands.

chrome/browser/extensions/global_shortcut_listener_chromeos.cc

Index: chrome/browser/extensions/global_shortcut_listener_chromeos.cc
diff --git a/chrome/browser/extensions/global_shortcut_listener_chromeos.cc b/chrome/browser/extensions/global_shortcut_listener_chromeos.cc
new file mode 100644
index 0000000000000000000000000000000000000000..af97100c483f95c95e547dd6f9700553bc2fb871
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+++ b/chrome/browser/extensions/global_shortcut_listener_chromeos.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_chromeos.h"
+
+#include "content/public/browser/browser_thread.h"
+
+using content::BrowserThread;
+
+namespace {
+
+static base::LazyInstance<extensions::GlobalShortcutListenerChromeOS> instance =
+    LAZY_INSTANCE_INITIALIZER;
+
+}  // namespace
+
+namespace extensions {
+
+// static
+GlobalShortcutListener* GlobalShortcutListener::GetInstance() {
+  CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  return instance.Pointer();
+}
+
+GlobalShortcutListenerChromeOS::GlobalShortcutListenerChromeOS()
+    : is_listening_(false) {
+  CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  // TODO(implementor): Remove this.
+  LOG(ERROR) << "GlobalShortcutListenerChromeOS object created";
+}
+
+GlobalShortcutListenerChromeOS::~GlobalShortcutListenerChromeOS() {
+  if (is_listening_)
+    StopListening();
+}
+
+void GlobalShortcutListenerChromeOS::StartListening() {
+  DCHECK(!is_listening_);  // Don't start twice.
+  NOTIMPLEMENTED();
+  is_listening_ = true;
+}
+
+void GlobalShortcutListenerChromeOS::StopListening() {
+  DCHECK(is_listening_);  // No point if we are not already listening.
+  NOTIMPLEMENTED();
+  is_listening_ = false;
+}
+
+void GlobalShortcutListenerChromeOS::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 GlobalShortcutListenerChromeOS::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