Revert of Remove remote tree host and some related input and metro_driver code

ui/base/ime/remote_input_method_win_unittest.cc

Index: ui/base/ime/remote_input_method_win_unittest.cc
diff --git a/ui/base/ime/remote_input_method_win_unittest.cc b/ui/base/ime/remote_input_method_win_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..2d15919d938b6a2681cfc214486cf095ddf9fd48
--- /dev/null
+++ b/ui/base/ime/remote_input_method_win_unittest.cc
@@ -0,0 +1,831 @@
+// Copyright 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 "ui/base/ime/remote_input_method_win.h"
+
+#include <InputScope.h>
+#include <stddef.h>
+#include <stdint.h>
+
+#include <vector>
+
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/scoped_observer.h"
+#include "base/strings/string16.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/base/ime/composition_text.h"
+#include "ui/base/ime/dummy_text_input_client.h"
+#include "ui/base/ime/input_method.h"
+#include "ui/base/ime/input_method_delegate.h"
+#include "ui/base/ime/input_method_observer.h"
+#include "ui/base/ime/remote_input_method_delegate_win.h"
+#include "ui/events/event.h"
+
+namespace ui {
+namespace {
+
+class MockTextInputClient : public DummyTextInputClient {
+ public:
+  MockTextInputClient()
+      : text_input_type_(TEXT_INPUT_TYPE_NONE),
+        text_input_mode_(TEXT_INPUT_MODE_DEFAULT),
+        call_count_set_composition_text_(0),
+        call_count_insert_char_(0),
+        call_count_insert_text_(0),
+        emulate_pepper_flash_(false) {
+  }
+
+  size_t call_count_set_composition_text() const {
+    return call_count_set_composition_text_;
+  }
+  const base::string16& inserted_text() const {
+    return inserted_text_;
+  }
+  size_t call_count_insert_char() const {
+    return call_count_insert_char_;
+  }
+  size_t call_count_insert_text() const {
+    return call_count_insert_text_;
+  }
+  void Reset() {
+    text_input_type_ = TEXT_INPUT_TYPE_NONE;
+    text_input_mode_ = TEXT_INPUT_MODE_DEFAULT;
+    call_count_set_composition_text_ = 0;
+    inserted_text_.clear();
+    call_count_insert_char_ = 0;
+    call_count_insert_text_ = 0;
+    caret_bounds_ = gfx::Rect();
+    composition_character_bounds_.clear();
+    emulate_pepper_flash_ = false;
+  }
+  void set_text_input_type(ui::TextInputType type) {
+    text_input_type_ = type;
+  }
+  void set_text_input_mode(ui::TextInputMode mode) {
+    text_input_mode_ = mode;
+  }
+  void set_caret_bounds(const gfx::Rect& caret_bounds) {
+    caret_bounds_ = caret_bounds;
+  }
+  void set_composition_character_bounds(
+      const std::vector<gfx::Rect>& composition_character_bounds) {
+    composition_character_bounds_ = composition_character_bounds;
+  }
+  void set_emulate_pepper_flash(bool enabled) {
+    emulate_pepper_flash_ = enabled;
+  }
+
+ private:
+  // Overriden from DummyTextInputClient.
+  void SetCompositionText(const ui::CompositionText& composition) override {
+    ++call_count_set_composition_text_;
+  }
+  void InsertChar(const ui::KeyEvent& event) override {
+    inserted_text_.append(1, event.GetCharacter());
+    ++call_count_insert_char_;
+  }
+  void InsertText(const base::string16& text) override {
+    inserted_text_.append(text);
+    ++call_count_insert_text_;
+  }
+  ui::TextInputType GetTextInputType() const override {
+    return text_input_type_;
+  }
+  ui::TextInputMode GetTextInputMode() const override {
+    return text_input_mode_;
+  }
+  gfx::Rect GetCaretBounds() const override { return caret_bounds_; }
+  bool GetCompositionCharacterBounds(uint32_t index,
+                                     gfx::Rect* rect) const override {
+    // Emulate the situation of crbug.com/328237.
+    if (emulate_pepper_flash_)
+      return false;
+    if (!rect || composition_character_bounds_.size() <= index)
+      return false;
+    *rect = composition_character_bounds_[index];
+    return true;
+  }
+  bool HasCompositionText() const override {
+    return !composition_character_bounds_.empty();
+  }
+  bool GetCompositionTextRange(gfx::Range* range) const override {
+    if (composition_character_bounds_.empty())
+      return false;
+    *range = gfx::Range(0, composition_character_bounds_.size());
+    return true;
+  }
+
+  ui::TextInputType text_input_type_;
+  ui::TextInputMode text_input_mode_;
+  gfx::Rect caret_bounds_;
+  std::vector<gfx::Rect> composition_character_bounds_;
+  base::string16 inserted_text_;
+  size_t call_count_set_composition_text_;
+  size_t call_count_insert_char_;
+  size_t call_count_insert_text_;
+  bool emulate_pepper_flash_;
+  DISALLOW_COPY_AND_ASSIGN(MockTextInputClient);
+};
+
+class MockInputMethodDelegate : public internal::InputMethodDelegate {
+ public:
+  MockInputMethodDelegate() {}
+
+  const std::vector<ui::KeyboardCode>& fabricated_key_events() const {
+    return fabricated_key_events_;
+  }
+  void Reset() {
+    fabricated_key_events_.clear();
+  }
+
+ private:
+  ui::EventDispatchDetails DispatchKeyEventPostIME(
+      ui::KeyEvent* event) override {
+    EXPECT_FALSE(event->HasNativeEvent());
+    fabricated_key_events_.push_back(event->key_code());
+    event->SetHandled();
+    return ui::EventDispatchDetails();
+  }
+
+  std::vector<ui::KeyboardCode> fabricated_key_events_;
+  DISALLOW_COPY_AND_ASSIGN(MockInputMethodDelegate);
+};
+
+class MockRemoteInputMethodDelegateWin
+    : public internal::RemoteInputMethodDelegateWin {
+ public:
+  MockRemoteInputMethodDelegateWin()
+      : cancel_composition_called_(false),
+        text_input_client_updated_called_(false) {
+  }
+
+  bool cancel_composition_called() const {
+    return cancel_composition_called_;
+  }
+  bool text_input_client_updated_called() const {
+    return text_input_client_updated_called_;
+  }
+  const std::vector<int32_t>& input_scopes() const { return input_scopes_; }
+  const std::vector<gfx::Rect>& composition_character_bounds() const {
+    return composition_character_bounds_;
+  }
+  void Reset() {
+    cancel_composition_called_ = false;
+    text_input_client_updated_called_ = false;
+    input_scopes_.clear();
+    composition_character_bounds_.clear();
+  }
+
+ private:
+  void CancelComposition() override { cancel_composition_called_ = true; }
+
+  void OnTextInputClientUpdated(
+      const std::vector<int32_t>& input_scopes,
+      const std::vector<gfx::Rect>& composition_character_bounds) override {
+    text_input_client_updated_called_ = true;
+    input_scopes_ = input_scopes;
+    composition_character_bounds_ = composition_character_bounds;
+  }
+
+  bool cancel_composition_called_;
+  bool text_input_client_updated_called_;
+  std::vector<int32_t> input_scopes_;
+  std::vector<gfx::Rect> composition_character_bounds_;
+  DISALLOW_COPY_AND_ASSIGN(MockRemoteInputMethodDelegateWin);
+};
+
+class MockInputMethodObserver : public InputMethodObserver {
+ public:
+  MockInputMethodObserver()
+      : on_text_input_state_changed_(0),
+        on_input_method_destroyed_changed_(0) {
+  }
+  ~MockInputMethodObserver() override {}
+  void Reset() {
+    on_text_input_state_changed_ = 0;
+    on_input_method_destroyed_changed_ = 0;
+  }
+  size_t on_text_input_state_changed() const {
+    return on_text_input_state_changed_;
+  }
+  size_t on_input_method_destroyed_changed() const {
+    return on_input_method_destroyed_changed_;
+  }
+
+ private:
+  // Overriden from InputMethodObserver.
+  void OnTextInputTypeChanged(const TextInputClient* client) override {}
+  void OnFocus() override {}
+  void OnBlur() override {}
+  void OnCaretBoundsChanged(const TextInputClient* client) override {}
+  void OnTextInputStateChanged(const TextInputClient* client) override {
+    ++on_text_input_state_changed_;
+  }
+  void OnInputMethodDestroyed(const InputMethod* client) override {
+    ++on_input_method_destroyed_changed_;
+  }
+  void OnShowImeIfNeeded() override {}
+
+  size_t on_text_input_state_changed_;
+  size_t on_input_method_destroyed_changed_;
+  DISALLOW_COPY_AND_ASSIGN(MockInputMethodObserver);
+};
+
+typedef ScopedObserver<InputMethod, InputMethodObserver>
+    InputMethodScopedObserver;
+
+TEST(RemoteInputMethodWinTest, RemoteInputMethodPrivateWin) {
+  InputMethod* other_ptr = static_cast<InputMethod*>(NULL) + 1;
+
+  // Use typed NULL to make EXPECT_NE happy until nullptr becomes available.
+  RemoteInputMethodPrivateWin* kNull =
+      static_cast<RemoteInputMethodPrivateWin*>(NULL);
+  EXPECT_EQ(kNull, RemoteInputMethodPrivateWin::Get(other_ptr));
+
+  MockInputMethodDelegate delegate_;
+  scoped_ptr<InputMethod> input_method(CreateRemoteInputMethodWin(&delegate_));
+  EXPECT_NE(kNull, RemoteInputMethodPrivateWin::Get(input_method.get()));
+
+  InputMethod* dangling_ptr = input_method.get();
+  input_method.reset(NULL);
+  EXPECT_EQ(kNull, RemoteInputMethodPrivateWin::Get(dangling_ptr));
+}
+
+TEST(RemoteInputMethodWinTest, OnInputSourceChanged) {
+  MockInputMethodDelegate delegate_;
+  scoped_ptr<InputMethod> input_method(CreateRemoteInputMethodWin(&delegate_));
+  RemoteInputMethodPrivateWin* private_ptr =
+      RemoteInputMethodPrivateWin::Get(input_method.get());
+  ASSERT_TRUE(private_ptr != NULL);
+
+  private_ptr->OnInputSourceChanged(
+      MAKELANGID(LANG_JAPANESE, SUBLANG_JAPANESE_JAPAN), true);
+  EXPECT_EQ("ja-JP", input_method->GetInputLocale());
+
+  private_ptr->OnInputSourceChanged(
+      MAKELANGID(LANG_ARABIC, SUBLANG_ARABIC_QATAR), true);
+  EXPECT_EQ("ar-QA", input_method->GetInputLocale());
+}
+
+TEST(RemoteInputMethodWinTest, OnCandidatePopupChanged) {
+  MockInputMethodDelegate delegate_;
+  scoped_ptr<InputMethod> input_method(CreateRemoteInputMethodWin(&delegate_));
+  RemoteInputMethodPrivateWin* private_ptr =
+      RemoteInputMethodPrivateWin::Get(input_method.get());
+  ASSERT_TRUE(private_ptr != NULL);
+
+  // Initial value
+  EXPECT_FALSE(input_method->IsCandidatePopupOpen());
+
+  // RemoteInputMethodWin::OnCandidatePopupChanged can be called even when the
+  // focused text input client is NULL.
+  ASSERT_TRUE(input_method->GetTextInputClient() == NULL);
+  private_ptr->OnCandidatePopupChanged(false);
+  private_ptr->OnCandidatePopupChanged(true);
+
+  MockTextInputClient mock_text_input_client;
+  input_method->SetFocusedTextInputClient(&mock_text_input_client);
+
+  mock_text_input_client.Reset();
+
+  private_ptr->OnCandidatePopupChanged(true);
+  EXPECT_TRUE(input_method->IsCandidatePopupOpen());
+
+  private_ptr->OnCandidatePopupChanged(false);
+  EXPECT_FALSE(input_method->IsCandidatePopupOpen());
+}
+
+TEST(RemoteInputMethodWinTest, CancelComposition) {
+  MockInputMethodDelegate delegate_;
+  MockTextInputClient mock_text_input_client;
+  scoped_ptr<InputMethod> input_method(CreateRemoteInputMethodWin(&delegate_));
+
+  // This must not cause a crash.
+  input_method->CancelComposition(&mock_text_input_client);
+
+  RemoteInputMethodPrivateWin* private_ptr =
+      RemoteInputMethodPrivateWin::Get(input_method.get());
+  ASSERT_TRUE(private_ptr != NULL);
+  MockRemoteInputMethodDelegateWin mock_remote_delegate;
+  private_ptr->SetRemoteDelegate(&mock_remote_delegate);
+
+  input_method->CancelComposition(&mock_text_input_client);
+  EXPECT_FALSE(mock_remote_delegate.cancel_composition_called());
+
+  input_method->SetFocusedTextInputClient(&mock_text_input_client);
+  input_method->CancelComposition(&mock_text_input_client);
+  EXPECT_TRUE(mock_remote_delegate.cancel_composition_called());
+}
+
+TEST(RemoteInputMethodWinTest, SetFocusedTextInputClient) {
+  MockInputMethodDelegate delegate_;
+  MockTextInputClient mock_text_input_client;
+  scoped_ptr<InputMethod> input_method(CreateRemoteInputMethodWin(&delegate_));
+
+  mock_text_input_client.set_caret_bounds(gfx::Rect(10, 0, 10, 20));
+  mock_text_input_client.set_text_input_type(ui::TEXT_INPUT_TYPE_URL);
+  input_method->SetFocusedTextInputClient(&mock_text_input_client);
+
+  RemoteInputMethodPrivateWin* private_ptr =
+      RemoteInputMethodPrivateWin::Get(input_method.get());
+  ASSERT_TRUE(private_ptr != NULL);
+  MockRemoteInputMethodDelegateWin mock_remote_delegate;
+  private_ptr->SetRemoteDelegate(&mock_remote_delegate);
+
+  // Initial state must be synced.
+  EXPECT_TRUE(mock_remote_delegate.text_input_client_updated_called());
+  ASSERT_EQ(1u, mock_remote_delegate.composition_character_bounds().size());
+  EXPECT_EQ(gfx::Rect(10, 0, 10, 20),
+            mock_remote_delegate.composition_character_bounds()[0]);
+  ASSERT_EQ(1u, mock_remote_delegate.input_scopes().size());
+  EXPECT_EQ(IS_URL, mock_remote_delegate.input_scopes()[0]);
+
+  // State must be cleared by SetFocusedTextInputClient(NULL).
+  mock_remote_delegate.Reset();
+  input_method->SetFocusedTextInputClient(NULL);
+  EXPECT_TRUE(mock_remote_delegate.text_input_client_updated_called());
+  EXPECT_TRUE(mock_remote_delegate.composition_character_bounds().empty());
+  EXPECT_TRUE(mock_remote_delegate.input_scopes().empty());
+}
+
+TEST(RemoteInputMethodWinTest, DetachTextInputClient) {
+  MockInputMethodDelegate delegate_;
+  MockTextInputClient mock_text_input_client;
+  scoped_ptr<InputMethod> input_method(CreateRemoteInputMethodWin(&delegate_));
+
+  mock_text_input_client.set_caret_bounds(gfx::Rect(10, 0, 10, 20));
+  mock_text_input_client.set_text_input_type(ui::TEXT_INPUT_TYPE_URL);
+  input_method->SetFocusedTextInputClient(&mock_text_input_client);
+
+  RemoteInputMethodPrivateWin* private_ptr =
+      RemoteInputMethodPrivateWin::Get(input_method.get());
+  ASSERT_TRUE(private_ptr != NULL);
+  MockRemoteInputMethodDelegateWin mock_remote_delegate;
+  private_ptr->SetRemoteDelegate(&mock_remote_delegate);
+
+  // Initial state must be synced.
+  EXPECT_TRUE(mock_remote_delegate.text_input_client_updated_called());
+  ASSERT_EQ(1u, mock_remote_delegate.composition_character_bounds().size());
+  EXPECT_EQ(gfx::Rect(10, 0, 10, 20),
+    mock_remote_delegate.composition_character_bounds()[0]);
+  ASSERT_EQ(1u, mock_remote_delegate.input_scopes().size());
+  EXPECT_EQ(IS_URL, mock_remote_delegate.input_scopes()[0]);
+
+  // State must be cleared by DetachTextInputClient
+  mock_remote_delegate.Reset();
+  input_method->DetachTextInputClient(&mock_text_input_client);
+  EXPECT_TRUE(mock_remote_delegate.text_input_client_updated_called());
+  EXPECT_TRUE(mock_remote_delegate.composition_character_bounds().empty());
+  EXPECT_TRUE(mock_remote_delegate.input_scopes().empty());
+}
+
+TEST(RemoteInputMethodWinTest, OnCaretBoundsChanged) {
+  MockInputMethodDelegate delegate_;
+  MockTextInputClient mock_text_input_client;
+  scoped_ptr<InputMethod> input_method(CreateRemoteInputMethodWin(&delegate_));
+
+  // This must not cause a crash.
+  input_method->OnCaretBoundsChanged(&mock_text_input_client);
+
+  mock_text_input_client.set_caret_bounds(gfx::Rect(10, 0, 10, 20));
+  input_method->SetFocusedTextInputClient(&mock_text_input_client);
+
+  RemoteInputMethodPrivateWin* private_ptr =
+      RemoteInputMethodPrivateWin::Get(input_method.get());
+  ASSERT_TRUE(private_ptr != NULL);
+  MockRemoteInputMethodDelegateWin mock_remote_delegate;
+  private_ptr->SetRemoteDelegate(&mock_remote_delegate);
+
+  // Initial state must be synced.
+  EXPECT_TRUE(mock_remote_delegate.text_input_client_updated_called());
+  ASSERT_EQ(1u, mock_remote_delegate.composition_character_bounds().size());
+  EXPECT_EQ(gfx::Rect(10, 0, 10, 20),
+      mock_remote_delegate.composition_character_bounds()[0]);
+
+  // Redundant OnCaretBoundsChanged must be ignored.
+  mock_remote_delegate.Reset();
+  input_method->OnCaretBoundsChanged(&mock_text_input_client);
+  EXPECT_FALSE(mock_remote_delegate.text_input_client_updated_called());
+
+  // Check OnCaretBoundsChanged is handled. (w/o composition)
+  mock_remote_delegate.Reset();
+  mock_text_input_client.Reset();
+  mock_text_input_client.set_caret_bounds(gfx::Rect(10, 20, 30, 40));
+  input_method->OnCaretBoundsChanged(&mock_text_input_client);
+  EXPECT_TRUE(mock_remote_delegate.text_input_client_updated_called());
+  ASSERT_EQ(1u, mock_remote_delegate.composition_character_bounds().size());
+  EXPECT_EQ(gfx::Rect(10, 20, 30, 40),
+      mock_remote_delegate.composition_character_bounds()[0]);
+
+  // Check OnCaretBoundsChanged is handled. (w/ composition)
+  {
+    mock_remote_delegate.Reset();
+    mock_text_input_client.Reset();
+
+    std::vector<gfx::Rect> bounds;
+    bounds.push_back(gfx::Rect(10, 20, 30, 40));
+    bounds.push_back(gfx::Rect(40, 30, 20, 10));
+    mock_text_input_client.set_composition_character_bounds(bounds);
+    input_method->OnCaretBoundsChanged(&mock_text_input_client);
+    EXPECT_TRUE(mock_remote_delegate.text_input_client_updated_called());
+    EXPECT_EQ(bounds, mock_remote_delegate.composition_character_bounds());
+  }
+}
+
+// Test case against crbug.com/328237.
+TEST(RemoteInputMethodWinTest, OnCaretBoundsChangedForPepperFlash) {
+  MockInputMethodDelegate delegate_;
+  MockTextInputClient mock_text_input_client;
+  scoped_ptr<InputMethod> input_method(CreateRemoteInputMethodWin(&delegate_));
+  input_method->SetFocusedTextInputClient(&mock_text_input_client);
+
+  RemoteInputMethodPrivateWin* private_ptr =
+      RemoteInputMethodPrivateWin::Get(input_method.get());
+  ASSERT_TRUE(private_ptr != NULL);
+  MockRemoteInputMethodDelegateWin mock_remote_delegate;
+  private_ptr->SetRemoteDelegate(&mock_remote_delegate);
+
+  mock_remote_delegate.Reset();
+  mock_text_input_client.Reset();
+  mock_text_input_client.set_emulate_pepper_flash(true);
+
+  std::vector<gfx::Rect> caret_bounds;
+  caret_bounds.push_back(gfx::Rect(5, 15, 25, 35));
+  mock_text_input_client.set_caret_bounds(caret_bounds[0]);
+
+  std::vector<gfx::Rect> composition_bounds;
+  composition_bounds.push_back(gfx::Rect(10, 20, 30, 40));
+  composition_bounds.push_back(gfx::Rect(40, 30, 20, 10));
+  mock_text_input_client.set_composition_character_bounds(composition_bounds);
+  input_method->OnCaretBoundsChanged(&mock_text_input_client);
+  EXPECT_TRUE(mock_remote_delegate.text_input_client_updated_called());
+  // The caret bounds must be used when
+  // TextInputClient::GetCompositionCharacterBounds failed.
+  EXPECT_EQ(caret_bounds, mock_remote_delegate.composition_character_bounds());
+}
+
+TEST(RemoteInputMethodWinTest, OnTextInputTypeChanged) {
+  MockInputMethodDelegate delegate_;
+  MockTextInputClient mock_text_input_client;
+  scoped_ptr<InputMethod> input_method(CreateRemoteInputMethodWin(&delegate_));
+
+  // This must not cause a crash.
+  input_method->OnCaretBoundsChanged(&mock_text_input_client);
+
+  mock_text_input_client.set_text_input_type(ui::TEXT_INPUT_TYPE_URL);
+  input_method->SetFocusedTextInputClient(&mock_text_input_client);
+
+  RemoteInputMethodPrivateWin* private_ptr =
+      RemoteInputMethodPrivateWin::Get(input_method.get());
+  ASSERT_TRUE(private_ptr != NULL);
+  MockRemoteInputMethodDelegateWin mock_remote_delegate;
+  private_ptr->SetRemoteDelegate(&mock_remote_delegate);
+
+  // Initial state must be synced.
+  EXPECT_TRUE(mock_remote_delegate.text_input_client_updated_called());
+  ASSERT_EQ(1u, mock_remote_delegate.input_scopes().size());
+  EXPECT_EQ(IS_URL, mock_remote_delegate.input_scopes()[0]);
+
+  // Check TEXT_INPUT_TYPE_NONE is handled.
+  mock_remote_delegate.Reset();
+  mock_text_input_client.Reset();
+  mock_text_input_client.set_text_input_type(ui::TEXT_INPUT_TYPE_NONE);
+  mock_text_input_client.set_text_input_mode(ui::TEXT_INPUT_MODE_KATAKANA);
+  input_method->OnTextInputTypeChanged(&mock_text_input_client);
+  EXPECT_TRUE(mock_remote_delegate.text_input_client_updated_called());
+  EXPECT_TRUE(mock_remote_delegate.input_scopes().empty());
+
+  // Redundant OnTextInputTypeChanged must be ignored.
+  mock_remote_delegate.Reset();
+  input_method->OnTextInputTypeChanged(&mock_text_input_client);
+  EXPECT_FALSE(mock_remote_delegate.text_input_client_updated_called());
+
+  mock_remote_delegate.Reset();
+  mock_text_input_client.Reset();
+  mock_text_input_client.set_caret_bounds(gfx::Rect(10, 20, 30, 40));
+  input_method->OnCaretBoundsChanged(&mock_text_input_client);
+}
+
+TEST(RemoteInputMethodWinTest, DispatchKeyEvent_NativeKeyEvent) {
+  // Basically RemoteInputMethodWin does not handle native keydown event.
+
+  MockInputMethodDelegate delegate_;
+  MockTextInputClient mock_text_input_client;
+  scoped_ptr<InputMethod> input_method(CreateRemoteInputMethodWin(&delegate_));
+
+  const MSG wm_keydown = { NULL, WM_KEYDOWN, ui::VKEY_A };
+  ui::KeyEvent new_keydown(wm_keydown);
+  ui::KeyEvent native_keydown(new_keydown);
+
+  // This must not cause a crash.
+  input_method->DispatchKeyEvent(&native_keydown);
+  EXPECT_FALSE(native_keydown.handled());
+  EXPECT_TRUE(mock_text_input_client.inserted_text().empty());
+  EXPECT_TRUE(delegate_.fabricated_key_events().empty());
+  delegate_.Reset();
+  mock_text_input_client.Reset();
+
+  RemoteInputMethodPrivateWin* private_ptr =
+      RemoteInputMethodPrivateWin::Get(input_method.get());
+  ASSERT_TRUE(private_ptr != NULL);
+  MockRemoteInputMethodDelegateWin mock_remote_delegate;
+  private_ptr->SetRemoteDelegate(&mock_remote_delegate);
+
+  // TextInputClient is not focused yet here.
+  native_keydown = new_keydown;
+  input_method->DispatchKeyEvent(&native_keydown);
+  EXPECT_FALSE(native_keydown.handled());
+  EXPECT_TRUE(mock_text_input_client.inserted_text().empty());
+  EXPECT_TRUE(delegate_.fabricated_key_events().empty());
+  delegate_.Reset();
+  mock_text_input_client.Reset();
+
+  input_method->SetFocusedTextInputClient(&mock_text_input_client);
+
+  // TextInputClient is now focused here.
+  native_keydown = new_keydown;
+  input_method->DispatchKeyEvent(&native_keydown);
+  EXPECT_FALSE(native_keydown.handled());
+  EXPECT_TRUE(mock_text_input_client.inserted_text().empty());
+  EXPECT_TRUE(delegate_.fabricated_key_events().empty());
+  delegate_.Reset();
+  mock_text_input_client.Reset();
+}
+
+TEST(RemoteInputMethodWinTest, DispatchKeyEvent_NativeCharEvent) {
+  // RemoteInputMethodWin handles native char event if possible.
+
+  MockInputMethodDelegate delegate_;
+  MockTextInputClient mock_text_input_client;
+  scoped_ptr<InputMethod> input_method(CreateRemoteInputMethodWin(&delegate_));
+
+  const MSG wm_char = { NULL, WM_CHAR, 'A', 0 };
+  ui::KeyEvent new_char(wm_char);
+  ui::KeyEvent native_char(new_char);
+
+  // This must not cause a crash.
+  input_method->DispatchKeyEvent(&native_char);
+  EXPECT_FALSE(native_char.handled());
+  EXPECT_TRUE(mock_text_input_client.inserted_text().empty());
+  EXPECT_TRUE(delegate_.fabricated_key_events().empty());
+  delegate_.Reset();
+  mock_text_input_client.Reset();
+
+  RemoteInputMethodPrivateWin* private_ptr =
+      RemoteInputMethodPrivateWin::Get(input_method.get());
+  ASSERT_TRUE(private_ptr != NULL);
+  MockRemoteInputMethodDelegateWin mock_remote_delegate;
+  private_ptr->SetRemoteDelegate(&mock_remote_delegate);
+
+  // TextInputClient is not focused yet here.
+  native_char = new_char;
+  input_method->DispatchKeyEvent(&native_char);
+  EXPECT_FALSE(native_char.handled());
+  EXPECT_TRUE(mock_text_input_client.inserted_text().empty());
+  EXPECT_TRUE(delegate_.fabricated_key_events().empty());
+  delegate_.Reset();
+  mock_text_input_client.Reset();
+
+  input_method->SetFocusedTextInputClient(&mock_text_input_client);
+
+  // TextInputClient is now focused here.
+  native_char = new_char;
+  input_method->DispatchKeyEvent(&native_char);
+  EXPECT_TRUE(native_char.handled());
+  EXPECT_EQ(L"A", mock_text_input_client.inserted_text());
+  EXPECT_TRUE(delegate_.fabricated_key_events().empty());
+  delegate_.Reset();
+  mock_text_input_client.Reset();
+}
+
+TEST(RemoteInputMethodWinTest, DispatchKeyEvent_FabricatedKeyDown) {
+  // Fabricated non-char event will be delegated to
+  // InputMethodDelegate::DispatchFabricatedKeyEventPostIME as long as the
+  // delegate is installed.
+
+  MockInputMethodDelegate delegate_;
+  MockTextInputClient mock_text_input_client;
+  scoped_ptr<InputMethod> input_method(CreateRemoteInputMethodWin(&delegate_));
+
+  ui::KeyEvent new_keydown(ui::ET_KEY_PRESSED, ui::VKEY_A, ui::EF_NONE);
+  new_keydown.set_character(L'A');
+  ui::KeyEvent fabricated_keydown(new_keydown);
+
+  // This must not cause a crash.
+  input_method->DispatchKeyEvent(&fabricated_keydown);
+  EXPECT_TRUE(fabricated_keydown.handled());
+  EXPECT_TRUE(mock_text_input_client.inserted_text().empty());
+  ASSERT_EQ(1u, delegate_.fabricated_key_events().size());
+  EXPECT_EQ(L'A', delegate_.fabricated_key_events()[0]);
+  delegate_.Reset();
+  mock_text_input_client.Reset();
+
+  RemoteInputMethodPrivateWin* private_ptr =
+      RemoteInputMethodPrivateWin::Get(input_method.get());
+  ASSERT_TRUE(private_ptr != NULL);
+  MockRemoteInputMethodDelegateWin mock_remote_delegate;
+  private_ptr->SetRemoteDelegate(&mock_remote_delegate);
+
+  // TextInputClient is not focused yet here.
+  fabricated_keydown = new_keydown;
+  input_method->DispatchKeyEvent(&fabricated_keydown);
+  EXPECT_TRUE(fabricated_keydown.handled());
+  EXPECT_TRUE(mock_text_input_client.inserted_text().empty());
+  ASSERT_EQ(1u, delegate_.fabricated_key_events().size());
+  EXPECT_EQ(L'A', delegate_.fabricated_key_events()[0]);
+  delegate_.Reset();
+  mock_text_input_client.Reset();
+
+  input_method->SetFocusedTextInputClient(&mock_text_input_client);
+  // TextInputClient is now focused here.
+  fabricated_keydown = new_keydown;
+  input_method->DispatchKeyEvent(&fabricated_keydown);
+  EXPECT_TRUE(fabricated_keydown.handled());
+  EXPECT_TRUE(mock_text_input_client.inserted_text().empty());
+  ASSERT_EQ(1u, delegate_.fabricated_key_events().size());
+  EXPECT_EQ(L'A', delegate_.fabricated_key_events()[0]);
+  delegate_.Reset();
+  mock_text_input_client.Reset();
+
+  input_method->SetDelegate(NULL);
+  // RemoteInputMethodDelegateWin is no longer set here.
+  fabricated_keydown = new_keydown;
+  input_method->DispatchKeyEvent(&fabricated_keydown);
+  EXPECT_FALSE(fabricated_keydown.handled());
+  EXPECT_TRUE(mock_text_input_client.inserted_text().empty());
+}
+
+TEST(RemoteInputMethodWinTest, DispatchKeyEvent_FabricatedChar) {
+  // Note: RemoteInputMethodWin::DispatchKeyEvent should always return true
+  // for fabricated character events.
+
+  MockInputMethodDelegate delegate_;
+  MockTextInputClient mock_text_input_client;
+  scoped_ptr<InputMethod> input_method(CreateRemoteInputMethodWin(&delegate_));
+
+  ui::KeyEvent new_char(L'A', ui::VKEY_A, ui::EF_NONE);
+  ui::KeyEvent fabricated_char(new_char);
+
+  // This must not cause a crash.
+  input_method->DispatchKeyEvent(&fabricated_char);
+  EXPECT_TRUE(fabricated_char.handled());
+  EXPECT_TRUE(mock_text_input_client.inserted_text().empty());
+  EXPECT_TRUE(delegate_.fabricated_key_events().empty());
+  delegate_.Reset();
+  mock_text_input_client.Reset();
+
+  RemoteInputMethodPrivateWin* private_ptr =
+      RemoteInputMethodPrivateWin::Get(input_method.get());
+  ASSERT_TRUE(private_ptr != NULL);
+  MockRemoteInputMethodDelegateWin mock_remote_delegate;
+  private_ptr->SetRemoteDelegate(&mock_remote_delegate);
+
+  // TextInputClient is not focused yet here.
+  fabricated_char = new_char;
+  input_method->DispatchKeyEvent(&fabricated_char);
+  EXPECT_TRUE(fabricated_char.handled());
+  EXPECT_TRUE(mock_text_input_client.inserted_text().empty());
+  EXPECT_TRUE(delegate_.fabricated_key_events().empty());
+  delegate_.Reset();
+  mock_text_input_client.Reset();
+
+  input_method->SetFocusedTextInputClient(&mock_text_input_client);
+
+  // TextInputClient is now focused here.
+  fabricated_char = new_char;
+  input_method->DispatchKeyEvent(&fabricated_char);
+  EXPECT_TRUE(fabricated_char.handled());
+  EXPECT_EQ(L"A", mock_text_input_client.inserted_text());
+  EXPECT_TRUE(delegate_.fabricated_key_events().empty());
+  delegate_.Reset();
+  mock_text_input_client.Reset();
+}
+
+TEST(RemoteInputMethodWinTest, OnCompositionChanged) {
+  MockInputMethodDelegate delegate_;
+  MockTextInputClient mock_text_input_client;
+  scoped_ptr<InputMethod> input_method(CreateRemoteInputMethodWin(&delegate_));
+
+  RemoteInputMethodPrivateWin* private_ptr =
+      RemoteInputMethodPrivateWin::Get(input_method.get());
+  ASSERT_TRUE(private_ptr != NULL);
+  MockRemoteInputMethodDelegateWin mock_remote_delegate;
+  private_ptr->SetRemoteDelegate(&mock_remote_delegate);
+
+  CompositionText composition_text;
+
+  // TextInputClient is not focused yet here.
+
+  private_ptr->OnCompositionChanged(composition_text);
+  EXPECT_EQ(0u, mock_text_input_client.call_count_set_composition_text());
+  delegate_.Reset();
+  mock_text_input_client.Reset();
+
+  input_method->SetFocusedTextInputClient(&mock_text_input_client);
+
+  // TextInputClient is now focused here.
+
+  private_ptr->OnCompositionChanged(composition_text);
+  EXPECT_EQ(1u, mock_text_input_client.call_count_set_composition_text());
+  delegate_.Reset();
+  mock_text_input_client.Reset();
+}
+
+TEST(RemoteInputMethodWinTest, OnTextCommitted) {
+  MockInputMethodDelegate delegate_;
+  MockTextInputClient mock_text_input_client;
+  scoped_ptr<InputMethod> input_method(CreateRemoteInputMethodWin(&delegate_));
+
+  RemoteInputMethodPrivateWin* private_ptr =
+      RemoteInputMethodPrivateWin::Get(input_method.get());
+  ASSERT_TRUE(private_ptr != NULL);
+  MockRemoteInputMethodDelegateWin mock_remote_delegate;
+  private_ptr->SetRemoteDelegate(&mock_remote_delegate);
+
+  base::string16 committed_text = L"Hello";
+
+  // TextInputClient is not focused yet here.
+
+  mock_text_input_client.set_text_input_type(TEXT_INPUT_TYPE_TEXT);
+  private_ptr->OnTextCommitted(committed_text);
+  EXPECT_EQ(0u, mock_text_input_client.call_count_insert_char());
+  EXPECT_EQ(0u, mock_text_input_client.call_count_insert_text());
+  EXPECT_EQ(L"", mock_text_input_client.inserted_text());
+  delegate_.Reset();
+  mock_text_input_client.Reset();
+
+  input_method->SetFocusedTextInputClient(&mock_text_input_client);
+
+  // TextInputClient is now focused here.
+
+  mock_text_input_client.set_text_input_type(TEXT_INPUT_TYPE_TEXT);
+  private_ptr->OnTextCommitted(committed_text);
+  EXPECT_EQ(0u, mock_text_input_client.call_count_insert_char());
+  EXPECT_EQ(1u, mock_text_input_client.call_count_insert_text());
+  EXPECT_EQ(committed_text, mock_text_input_client.inserted_text());
+  delegate_.Reset();
+  mock_text_input_client.Reset();
+
+  // When TextInputType is TEXT_INPUT_TYPE_NONE, TextInputClient::InsertText
+  // should not be used.
+  mock_text_input_client.set_text_input_type(TEXT_INPUT_TYPE_NONE);
+  private_ptr->OnTextCommitted(committed_text);
+  EXPECT_EQ(committed_text.size(),
+            mock_text_input_client.call_count_insert_char());
+  EXPECT_EQ(0u, mock_text_input_client.call_count_insert_text());
+  EXPECT_EQ(committed_text, mock_text_input_client.inserted_text());
+  delegate_.Reset();
+  mock_text_input_client.Reset();
+}
+
+TEST(RemoteInputMethodWinTest, OnTextInputStateChanged_Observer) {
+  DummyTextInputClient text_input_client;
+  DummyTextInputClient text_input_client_the_other;
+
+  MockInputMethodObserver input_method_observer;
+  MockInputMethodDelegate delegate_;
+  scoped_ptr<InputMethod> input_method(CreateRemoteInputMethodWin(&delegate_));
+  InputMethodScopedObserver scoped_observer(&input_method_observer);
+  scoped_observer.Add(input_method.get());
+
+  input_method->SetFocusedTextInputClient(&text_input_client);
+  ASSERT_EQ(&text_input_client, input_method->GetTextInputClient());
+  EXPECT_EQ(1u, input_method_observer.on_text_input_state_changed());
+  input_method_observer.Reset();
+
+  input_method->SetFocusedTextInputClient(&text_input_client);
+  ASSERT_EQ(&text_input_client, input_method->GetTextInputClient());
+  EXPECT_EQ(0u, input_method_observer.on_text_input_state_changed());
+  input_method_observer.Reset();
+
+  input_method->SetFocusedTextInputClient(&text_input_client_the_other);
+  ASSERT_EQ(&text_input_client_the_other, input_method->GetTextInputClient());
+  EXPECT_EQ(1u, input_method_observer.on_text_input_state_changed());
+  input_method_observer.Reset();
+
+  input_method->DetachTextInputClient(&text_input_client_the_other);
+  ASSERT_TRUE(input_method->GetTextInputClient() == NULL);
+  EXPECT_EQ(1u, input_method_observer.on_text_input_state_changed());
+  input_method_observer.Reset();
+}
+
+TEST(RemoteInputMethodWinTest, OnInputMethodDestroyed_Observer) {
+  DummyTextInputClient text_input_client;
+  DummyTextInputClient text_input_client_the_other;
+
+  MockInputMethodObserver input_method_observer;
+  InputMethodScopedObserver scoped_observer(&input_method_observer);
+
+  MockInputMethodDelegate delegate_;
+  scoped_ptr<InputMethod> input_method(CreateRemoteInputMethodWin(&delegate_));
+  input_method->AddObserver(&input_method_observer);
+
+  EXPECT_EQ(0u, input_method_observer.on_input_method_destroyed_changed());
+  input_method.reset();
+  EXPECT_EQ(1u, input_method_observer.on_input_method_destroyed_changed());
+}
+
+}  // namespace
+}  // namespace ui