Revert of Show the Cast toolbar icon ephemerally when Cast is in use

chrome/browser/ui/toolbar/toolbar_actions_model_unittest.cc

Index: chrome/browser/ui/toolbar/toolbar_actions_model_unittest.cc
diff --git a/chrome/browser/ui/toolbar/toolbar_actions_model_unittest.cc b/chrome/browser/ui/toolbar/toolbar_actions_model_unittest.cc
index dbb66e5e324f9e620bb842b8729406e6aaf1578d..a4bbd98b39ed1fe0cd82031bee7b6399578d1b0e 100644
--- a/chrome/browser/ui/toolbar/toolbar_actions_model_unittest.cc
+++ b/chrome/browser/ui/toolbar/toolbar_actions_model_unittest.cc
@@ -1308,6 +1308,36 @@
             observer()->inserted_count() - observer()->removed_count());
 }
 
+TEST_F(ToolbarActionsModelUnitTest, ComponentExtensionsAddedToEnd) {
+  Init();
+
+  ASSERT_TRUE(AddBrowserActionExtensions());
+
+  EXPECT_EQ(browser_action_a()->id(), GetActionIdAtIndex(0));
+  EXPECT_EQ(browser_action_b()->id(), GetActionIdAtIndex(1));
+  EXPECT_EQ(browser_action_c()->id(), GetActionIdAtIndex(2));
+
+  const char kName[] = "component";
+  extensions::DictionaryBuilder manifest;
+  manifest.Set("name", kName)
+      .Set("description", "An extension")
+      .Set("manifest_version", 2)
+      .Set("version", "1.0.0")
+      .Set("browser_action", extensions::DictionaryBuilder().Build());
+  scoped_refptr<const extensions::Extension> component_extension =
+      extensions::ExtensionBuilder()
+          .SetManifest(manifest.Build())
+          .SetID(crx_file::id_util::GenerateId(kName))
+          .SetLocation(extensions::Manifest::COMPONENT)
+          .Build();
+  service()->AddExtension(component_extension.get());
+
+  EXPECT_EQ(component_extension.get()->id(), GetActionIdAtIndex(0));
+  EXPECT_EQ(browser_action_a()->id(), GetActionIdAtIndex(1));
+  EXPECT_EQ(browser_action_b()->id(), GetActionIdAtIndex(2));
+  EXPECT_EQ(browser_action_c()->id(), GetActionIdAtIndex(3));
+}
+
 // Test various different reorderings, removals, and reinsertions of the
 // toolbar with component actions.
 TEST_F(ToolbarActionsModelUnitTest,