Revert "Fix an edge case bug in Windows TSF1 implementation."

This reverts commit 7ab2e8d.

Reason for revert: cause regression in Omnibox with Korean autocomplete feature.

Original change's description:
> Fix an edge case bug in Windows TSF1 implementation.
>
> There is a bug in TSF1 impl where IME such as voice typing can select
> text before composition start when user says "select that" command. In
> this case, we need to select text that is before composition start.
>
> Bug: 1295578
> Change-Id: I873689569b542f8147a31d1b3837cdf543478875
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3449664
> Reviewed-by: Yohei Yukawa <yukawa@chromium.org>
> Commit-Queue: Siye Liu <siliu@microsoft.com>
> Cr-Commit-Position: refs/heads/main@{#971181}

Bug: 1295578
Change-Id: I24e12bd23b10e20beeea4297d9274ed6029998db
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3572984
Reviewed-by: Siye Liu <siliu@microsoft.com>
Reviewed-by: Prudhvikumar Bommana <pbommana@google.com>
Owners-Override: Prudhvikumar Bommana <pbommana@google.com>
Commit-Queue: Srinivas Sista <srinivassista@chromium.org>
Cr-Commit-Position: refs/branch-heads/4986@{#3}
Cr-Branched-From: 248158e-refs/heads/main@{#988910}

ui/base/ime/win/tsf_text_store.cc

@@ -1488,12 +1488,6 @@ void TSFTextStore::CommitTextAndEndCompositionIfAny(size_t old_size,
   } else {
     text_input_client_->ClearCompositionText();
   }
-
-  if (!selection_.is_empty() && !is_selection_interim_char_ &&
-      selection_.GetMax() <= string_buffer_document_.size()) {
-    text_input_client_->SetEditableSelectionRange(selection_);
-  }
-
   // Notify accessibility about this committed composition
   text_input_client_->SetActiveCompositionForAccessibility(
       replace_text_range_, new_committed_string,

ui/base/ime/win/tsf_text_store_unittest.cc

@@ -4231,113 +4231,6 @@ TEST_F(TSFTextStoreTest, RegressionTest13) {
   EXPECT_EQ(S_OK, result);
 }
 
-// regression tests for crbug.com/1295578.
-// Some IMEs (e.g. voice typing panel) may select text before active
-// composition. We should select text after composition end.
-class RegressionTest14Callback : public TSFTextStoreTestCallback {
- public:
-  explicit RegressionTest14Callback(TSFTextStore* text_store)
-      : TSFTextStoreTestCallback(text_store) {}
-
-  RegressionTest14Callback(const RegressionTest14Callback&) = delete;
-  RegressionTest14Callback& operator=(const RegressionTest14Callback&) = delete;
-
-  HRESULT LockGranted1(DWORD flags) {
-    SetTextTest(0, 0, L"text ", S_OK);
-    SetTextTest(4, 5, L"", S_OK);
-    SetTextTest(4, 4, L" select that ", S_OK);
-    SetSelectionTest(17, 17, S_OK);
-
-    text_spans()->clear();
-    ImeTextSpan text_span;
-    text_span.start_offset = 4;
-    text_span.end_offset = 17;
-    text_span.underline_color = SK_ColorBLACK;
-    text_span.thickness = ImeTextSpan::Thickness::kThin;
-    text_span.background_color = SK_ColorTRANSPARENT;
-    text_spans()->push_back(text_span);
-    *edit_flag() = true;
-    *composition_start() = 4;
-    composition_range()->set_start(4);
-    composition_range()->set_end(17);
-    *has_composition_range() = true;
-
-    return S_OK;
-  }
-
-  void SetCompositionText1(const ui::CompositionText& composition) {
-    EXPECT_EQ(u" select that ", composition.text);
-    EXPECT_EQ(13u, composition.selection.start());
-    EXPECT_EQ(13u, composition.selection.end());
-    ASSERT_EQ(1u, composition.ime_text_spans.size());
-    EXPECT_EQ(0u, composition.ime_text_spans[0].start_offset);
-    EXPECT_EQ(13u, composition.ime_text_spans[0].end_offset);
-    SetHasCompositionText(true);
-    SetTextRange(0, 17);
-    SetTextBuffer(u"text select that ");
-    SetSelectionRange(17, 17);
-  }
-
-  HRESULT LockGranted2(DWORD flags) {
-    GetTextTest(0, -1, L"text select that ", 17);
-    SetTextTest(4, 17, L"", S_OK);
-    GetTextTest(0, -1, L"text", 4);
-    SetSelectionTest(0, 4, S_OK);
-
-    text_spans()->clear();
-    *edit_flag() = true;
-    *composition_start() = 0;
-    composition_range()->set_start(0);
-    composition_range()->set_end(0);
-    *has_composition_range() = false;
-
-    return S_OK;
-  }
-
-  bool SetEditableSelectionRange2(const gfx::Range& range) {
-    EXPECT_EQ(range.GetMin(), 0u);
-    EXPECT_EQ(range.length(), 4u);
-    return true;
-  }
-
-  HRESULT LockGranted3(DWORD flags) {
-    GetTextTest(0, -1, L"text", 4);
-    GetSelectionTest(0, 4);
-
-    return S_OK;
-  }
-};
-
-TEST_F(TSFTextStoreTest, RegressionTest14) {
-  RegressionTest14Callback callback(text_store_.get());
-  EXPECT_CALL(text_input_client_, InsertText(_, _)).Times(0);
-  EXPECT_CALL(text_input_client_, SetCompositionText(_))
-      .WillOnce(
-          Invoke(&callback, &RegressionTest14Callback::SetCompositionText1));
-  EXPECT_CALL(text_input_client_, SetEditableSelectionRange(_))
-      .WillOnce(Invoke(&callback,
-                       &RegressionTest14Callback::SetEditableSelectionRange2));
-
-  EXPECT_CALL(*sink_, OnLockGranted(_))
-      .WillOnce(Invoke(&callback, &RegressionTest14Callback::LockGranted1))
-      .WillOnce(Invoke(&callback, &RegressionTest14Callback::LockGranted2))
-      .WillOnce(Invoke(&callback, &RegressionTest14Callback::LockGranted3));
-
-  ON_CALL(text_input_client_, HasCompositionText())
-      .WillByDefault(
-          Invoke(&callback, &TSFTextStoreTestCallback::HasCompositionText));
-
-  HRESULT result = kInvalidResult;
-  EXPECT_EQ(S_OK, text_store_->RequestLock(TS_LF_READWRITE, &result));
-  EXPECT_EQ(S_OK, result);
-  result = kInvalidResult;
-  EXPECT_EQ(S_OK, text_store_->RequestLock(TS_LF_READWRITE, &result));
-  EXPECT_EQ(S_OK, result);
-  result = kInvalidResult;
-  EXPECT_EQ(S_OK, text_store_->RequestLock(TS_LF_READWRITE, &result));
-  EXPECT_EQ(S_OK, result);
-}
-
 // Test multiple |SetText| call in one edit session.
 class MultipleSetTextCallback : public TSFTextStoreTestCallback {
  public: