Add chrome://enable-web-authentication-ctap2-support

This patch addes UI flag that enables by default support of CTAP2
security keys.

Bug: 780078
Change-Id: Ib182644ddf98ebc80e7ffe9fb4bc66c76c44a98b
Reviewed-on: https://chromium-review.googlesource.com/1101900
Commit-Queue: Jun Choi <hongjunchoi@chromium.org>
Reviewed-by: Kim Paulhamus <kpaulhamus@chromium.org>
Reviewed-by: Balazs Engedy <engedy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567792}

chrome/browser/about_flags.cc

@@ -3608,6 +3608,13 @@ const FeatureEntry kFeatureEntries[] = {
      kOsDesktop, SINGLE_VALUE_TYPE(switches::kEnableWebAuthTestingAPI)},
 #endif  // !defined(OS_ANDROID)
 
+#if !defined(OS_ANDROID)
+    {"enable-web-authentication-ctap2-support",
+     flag_descriptions::kEnableWebAuthenticationCtap2SupportName,
+     flag_descriptions::kEnableWebAuthenticationCtap2SupportDescription,
+     kOsDesktop, FEATURE_VALUE_TYPE(device::kNewCtap2Device)},
+#endif  // !defined(OS_ANDROID)
+
 #if defined(OS_ANDROID)
     {"enable-sole-integration", flag_descriptions::kSoleIntegrationName,
      flag_descriptions::kSoleIntegrationDescription, kOsAndroid,

chrome/browser/flag_descriptions.cc

@@ -2544,6 +2544,11 @@ const char kEnableWebAuthenticationAPIName[] = "Web Authentication API";
 const char kEnableWebAuthenticationAPIDescription[] =
     "Enable Web Authentication API support";
 
+const char kEnableWebAuthenticationCtap2SupportName[] =
+    "Enable Web Authentication API support for CTAP2 security keys";
+const char kEnableWebAuthenticationCtap2SupportDescription[] =
+    "Enable CTAP2 security keys for the Web Authenication API.";
+
 const char kEnableWebAuthenticationTestingAPIName[] =
     "Web Authentication Testing API";
 const char kEnableWebAuthenticationTestingAPIDescription[] =

chrome/browser/flag_descriptions.h

@@ -1551,6 +1551,9 @@ extern const char kEnableWebAuthenticationAPIDescription[];
 extern const char kEnableWebAuthenticationTestingAPIName[];
 extern const char kEnableWebAuthenticationTestingAPIDescription[];
 
+extern const char kEnableWebAuthenticationCtap2SupportName[];
+extern const char kEnableWebAuthenticationCtap2SupportDescription[];
+
 #if defined(GOOGLE_CHROME_BUILD)
 
 extern const char kGoogleBrandedContextMenuName[];

tools/metrics/histograms/enums.xml

@@ -27187,6 +27187,7 @@ from previous Chrome versions.
   <int value="-1377186702" label="DesktopIOSPromotion:disabled"/>
   <int value="-1376510363" label="ServiceWorkerScriptFullCodeCache:disabled"/>
   <int value="-1375111024" label="enable-fixed-position-compositing"/>
+  <int value="-1373942769" label="WebAuthenticationCtap2:disabled"/>
   <int value="-1373705581" label="ManualSaving:enabled"/>
   <int value="-1365503870" label="enable-simplified-fullscreen-ui"/>
   <int value="-1363709707" label="MaterialDesignHistory:disabled"/>
@@ -27371,6 +27372,7 @@ from previous Chrome versions.
   <int value="-972425050" label="gesture-editing"/>
   <int value="-969332901" label="stop-non-timers-in-background:disabled"/>
   <int value="-968010468" label="SharedArrayBuffer:disabled"/>
+  <int value="-966290456" label="WebAuthenticationCtap2:enabled"/>
   <int value="-965842218" label="MultiDeviceApi:disabled"/>
   <int value="-964676765" label="enable-accelerated-mjpeg-decode"/>
   <int value="-951394314" label="top-chrome-md"/>