Added Signin Parameters

base/test/android/javatests/src/org/chromium/base/test/util/parameter/Parameterizable.java

Index: base/test/android/javatests/src/org/chromium/base/test/util/parameter/Parameterizable.java
diff --git a/base/test/android/javatests/src/org/chromium/base/test/util/parameter/Parameterizable.java b/base/test/android/javatests/src/org/chromium/base/test/util/parameter/Parameterizable.java
index b271430fbddc3b906d524efe575b602c4c926135..f5c8ce8c7ca86d04c9fe025bdd4416c686aabad4 100644
--- a/base/test/android/javatests/src/org/chromium/base/test/util/parameter/Parameterizable.java
+++ b/base/test/android/javatests/src/org/chromium/base/test/util/parameter/Parameterizable.java
@@ -10,6 +10,27 @@ import java.util.Map;
  * An interface to implement on test cases to run {@link ParameterizedTest}s.
  */
 public interface Parameterizable {
+
+    /**
+     * Gets the {@link Map} of available parameters for the test to use.
+     *
+     * @return a {@link Map} of {@link BaseParameter} objects.
+     */
     Map<String, BaseParameter> getAvailableParameters();
+
+
+    /**
+     * Setter method for {@link Parameter.Reader}.
+     *
+     * @param parameterReader the {@link Parameter.Reader} to set.
+     */
     void setParameterReader(Parameter.Reader parameterReader);
+
+    /**
+     * Gets a specific parameter from the current test.
+     *
+     * @param parameterTag a string with the name of the {@link BaseParameter} we want.
+     * @return a parameter that extends {@link BaseParameter} that has the matching parameterTag.
+     */
+    <T extends BaseParameter> T getAvailableParameter(String parameterTag);
 }