[Passwords] Add WellKnownChangePassword to ...

... fieldtrial_testing_config.json. Furthermore, this change removes
the BrowserBlacklist experiment from the testing config in order to
stay below  Windows' 32767 character limit for command line arguments.

Bug: 927473
Change-Id: Id5250e76bebbea4217b1b21a0973eaeca5cd0bf1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2398506Reviewed-by: Chris Sharp <csharp@chromium.org>
Reviewed-by: Steven Holte <holte@chromium.org>
Commit-Queue: Jan Wilken Dörrie <jdoerrie@chromium.org>
Cr-Commit-Position: refs/heads/master@{#805221}

testing/variations/fieldtrial_testing_config.json

@@ -829,18 +829,6 @@
             ]
         }
     ],
-    "BrowserBlacklist": [
-        {
-            "platforms": [
-                "windows"
-            ],
-            "experiments": [
-                {
-                    "name": "Enabled"
-                }
-            ]
-        }
-    ],
     "BrowserJankinessProfiling": [
         {
             "platforms": [
@@ -8030,6 +8018,27 @@
             ]
         }
     ],
+    "WellKnownChangePassword": [
+        {
+            "platforms": [
+                "android",
+                "android_webview",
+                "chromeos",
+                "ios",
+                "linux",
+                "mac",
+                "windows"
+            ],
+            "experiments": [
+                {
+                    "name": "Enabled",
+                    "enable_features": [
+                        "WellKnownChangePassword"
+                    ]
+                }
+            ]
+        }
+    ],
     "WindowsNativeSpellChecker": [
         {
             "platforms": [