Remove enable-iframe-based-signin flag.

chrome/browser/profiles/host_zoom_map_browsertest.cc

Index: chrome/browser/profiles/host_zoom_map_browsertest.cc
diff --git a/chrome/browser/profiles/host_zoom_map_browsertest.cc b/chrome/browser/profiles/host_zoom_map_browsertest.cc
index 2fdf7811d7ce604115f39d52a1d5db0cfa9ac25b..7cf2ed71108cc78d7c7e74c87af8a84fb960d127 100644
--- a/chrome/browser/profiles/host_zoom_map_browsertest.cc
+++ b/chrome/browser/profiles/host_zoom_map_browsertest.cc
@@ -257,19 +257,10 @@ IN_PROC_BROWSER_TEST_F(
   // zoom map.
   HostZoomMap* default_profile_host_zoom_map =
       HostZoomMap::GetDefaultForBrowserContext(browser()->profile());
-  // Since ChromeOS still uses IFrame-based signin, we should expect the
-  // storage partition to be different if Webview signin is not enabled.
-  if (switches::IsEnableWebviewBasedSignin())
-    EXPECT_EQ(host_zoom_map, default_profile_host_zoom_map);
-  else
-    EXPECT_NE(host_zoom_map, default_profile_host_zoom_map);
+  EXPECT_EQ(host_zoom_map, default_profile_host_zoom_map);
 }
 
 class HostZoomMapIframeSigninBrowserTest : public HostZoomMapBrowserTest {
- public:
-  void SetUpCommandLine(base::CommandLine* command_line) override {
-    command_line->AppendSwitch(switches::kEnableIframeBasedSignin);
-  }
 };
 
 // Regression test for crbug.com/435017.
@@ -293,10 +284,9 @@ IN_PROC_BROWSER_TEST_F(HostZoomMapIframeSigninBrowserTest,
   // be in a different storage partition, and hence a different HostZoomMap.
   HostZoomMap* host_zoom_map = HostZoomMap::GetForWebContents(web_contents);
 
-  EXPECT_FALSE(switches::IsEnableWebviewBasedSignin());
   HostZoomMap* default_profile_host_zoom_map =
       HostZoomMap::GetDefaultForBrowserContext(browser()->profile());
-  EXPECT_NE(host_zoom_map, default_profile_host_zoom_map);
+  EXPECT_EQ(host_zoom_map, default_profile_host_zoom_map);
 
   double new_zoom_level =
       host_zoom_map->GetZoomLevelForHostAndScheme(test_scheme, test_host) + 0.5;