[WebID] Remove unnecessary k prefix in Identity flag names

You should be able to use "--enable-features=WebID" now.
Same for webotp backend flag.

Change-Id: Ibf3c71bff82f716989af3e01ce1cfe394c785fab
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2576008
Auto-Submit: Majid Valipour <majidvp@chromium.org>
Commit-Queue: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#834094}

content/public/common/content_features.cc

@@ -835,7 +835,7 @@ const base::Feature kWebGLImageChromium{"WebGLImageChromium",
                                         base::FEATURE_ENABLED_BY_DEFAULT};
 
 // Enable browser mediation API for federated identity interactions.
-const base::Feature kWebID{"kWebID", base::FEATURE_DISABLED_BY_DEFAULT};
+const base::Feature kWebID{"WebID", base::FEATURE_DISABLED_BY_DEFAULT};
 
 // Enable experimental policy-controlled features and LAPIs
 const base::Feature kExperimentalProductivityFeatures{
@@ -843,7 +843,7 @@ const base::Feature kExperimentalProductivityFeatures{
 
 // When this feature is enabled, the Web OTP API will use the User Consent
 // API to retrieve SMSes from the Android device.
-const base::Feature kWebOtpBackend{"kWebOtpBackend",
+const base::Feature kWebOtpBackend{"WebOtpBackend",
                                    base::FEATURE_DISABLED_BY_DEFAULT};
 
 // The JavaScript API for payments on the web.