Implements keyboard events for RenderViewTest....

chrome/renderer/mock_keyboard.cc

Index: chrome/renderer/mock_keyboard.cc
===================================================================
--- chrome/renderer/mock_keyboard.cc	(revision 0)
+++ chrome/renderer/mock_keyboard.cc	(revision 0)
@@ -0,0 +1,47 @@
+// Copyright (c) 2009 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/renderer/mock_keyboard.h"
+
+#include "base/logging.h"
+
+MockKeyboard::MockKeyboard()
+    : keyboard_layout_(LAYOUT_NULL),
+      keyboard_modifiers_(INVALID) {
+}
+
+MockKeyboard::~MockKeyboard() {
+}
+
+int MockKeyboard::GetCharacters(Layout layout,
+                                int key_code,
+                                Modifiers modifiers,
+                                std::wstring* output) {
+#if defined(OS_WIN)
+  CHECK(output);
+  // Change the keyboard layout only when we have to because it takes a lot of
+  // time to load a keyboard-layout driver.
+  // When we change the layout, we reset the modifier status to force updating
+  // the keyboard status.
+  if (layout != keyboard_layout_) {
+    if (!driver_.SetLayout(layout))
+      return -1;
+    keyboard_layout_ = layout;
+    keyboard_modifiers_ = INVALID;
+  }
+
+  // Update the keyboard states.
+  if (modifiers != keyboard_modifiers_) {
+    if (!driver_.SetModifiers(modifiers))
+      return -1;
+    keyboard_modifiers_ = modifiers;
+  }
+
+  // Retrieve Unicode characters associate with the key code.
+  return driver_.GetCharacters(key_code, output);
+#else
+  NOTIMPLEMENTED();
+  return -1;
+#endif
+}