Revert "Add browser tests for Reader Mode omnibox icon."

This reverts commit e6780b7e.

Reason for revert: seems to be breaking "browser_tests" on "linux-chromeos-chrome"

Original change's description:
> Add browser tests for Reader Mode omnibox icon.
> 
> Bug: 992074
> Change-Id: I2b54639a15222d2c30cf419c606b62ebd28597e1
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1951893
> Commit-Queue: Katie Dektar <katie@chromium.org>
> Reviewed-by: Elly Fong-Jones <ellyjones@chromium.org>
> Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#738661}

TBR=ellyjones@chromium.org,dmazzoni@chromium.org,katie@chromium.org,gilmanmh@google.com

Change-Id: I96214b491da480cd85f809ddb451c48f8a358ba2
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 992074, 1049350
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2040069Reviewed-by: Carlos Knippschild <carlosk@chromium.org>
Commit-Queue: Carlos Knippschild <carlosk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#738702}

chrome/browser/ui/views/reader_mode/reader_mode_icon_view_browsertest.cc

-// Copyright 2019 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/ui/views/reader_mode/reader_mode_icon_view.h"
-
-#include "base/test/scoped_feature_list.h"
-#include "chrome/browser/ui/page_action/page_action_icon_type.h"
-#include "chrome/browser/ui/views/frame/browser_view.h"
-#include "chrome/browser/ui/views/frame/toolbar_button_provider.h"
-#include "chrome/test/base/in_process_browser_test.h"
-#include "chrome/test/base/ui_test_utils.h"
-#include "components/dom_distiller/core/dom_distiller_features.h"
-#include "content/public/test/browser_test.h"
-#include "testing/gtest/include/gtest/gtest.h"
-#include "ui/views/test/button_test_api.h"
-
-namespace {
-
-const char* kSimpleArticlePath = "/dom_distiller/simple_article.html";
-const char* kNonArticlePath = "/dom_distiller/non_og_article.html";
-
-class ReaderModeIconViewBrowserTest : public InProcessBrowserTest {
- protected:
-  ReaderModeIconViewBrowserTest() : InProcessBrowserTest() {
-    feature_list_.InitAndEnableFeature(dom_distiller::kReaderMode);
-  }
-
-  void SetUpOnMainThread() override {
-    ASSERT_TRUE(embedded_test_server()->Start());
-    reader_mode_icon_ =
-        BrowserView::GetBrowserViewForBrowser(browser())
-            ->toolbar_button_provider()
-            ->GetPageActionIconView(PageActionIconType::kReaderMode);
-    ASSERT_NE(nullptr, reader_mode_icon_);
-  }
-
-  PageActionIconView* reader_mode_icon_;
-
- private:
-  base::test::ScopedFeatureList feature_list_;
-};
-
-// TODO(gilmanmh): Add tests for the following cases:
-//  * Icon is visible on the distilled page.
-//  * Icon is not visible on about://blank, both initially and after navigating
-//    to a distillable page.
-IN_PROC_BROWSER_TEST_F(ReaderModeIconViewBrowserTest,
-                       IconVisibilityAdaptsToPageContents) {
-  // The icon should not be visible by default, before navigation to any page
-  // has occurred.
-  const bool is_visible_before_navigation = reader_mode_icon_->GetVisible();
-  EXPECT_FALSE(is_visible_before_navigation);
-
-  // The icon should be hidden on pages that aren't distillable
-  ui_test_utils::NavigateToURL(browser(),
-                               embedded_test_server()->GetURL(kNonArticlePath));
-  const bool is_visible_on_non_distillable_page =
-      reader_mode_icon_->GetVisible();
-  EXPECT_FALSE(is_visible_on_non_distillable_page);
-
-  // The icon should appear after navigating to a distillable article.
-  ui_test_utils::NavigateToURL(
-      browser(), embedded_test_server()->GetURL(kSimpleArticlePath));
-  const bool is_visible_on_article = reader_mode_icon_->GetVisible();
-  EXPECT_TRUE(is_visible_on_article);
-
-  // Navigating back to a non-distillable page hides the icon again.
-  ui_test_utils::NavigateToURL(browser(),
-                               embedded_test_server()->GetURL(kNonArticlePath));
-  const bool is_visible_after_navigation_back_to_non_distillable_page =
-      reader_mode_icon_->GetVisible();
-  EXPECT_FALSE(is_visible_after_navigation_back_to_non_distillable_page);
-}
-
-}  // namespace

chrome/test/BUILD.gn

@@ -1339,7 +1339,6 @@ if (!is_android) {
       "../browser/ui/views/device_chooser_browsertest.cc",
       "../browser/ui/views/hats/hats_browsertest.cc",
       "../browser/ui/views/intent_picker_bubble_view_browsertest.cc",
-      "../browser/ui/views/reader_mode/reader_mode_icon_view_browsertest.cc",
       "../browser/ui/views/try_chrome_dialog_win/try_chrome_dialog_browsertest.cc",
       "../browser/ui/views/web_apps/web_app_frame_toolbar_browsertest.cc",
       "../browser/ui/views/web_apps/web_app_minimal_ui_test.cc",