Fix variable name typos in comment cross-references

TBR=droger@chromium.org

Bug: None
Change-Id: Id67464ecc19669fe82666dc4c4c38042ef2827d1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2403482Reviewed-by: Victor Vianna <victorvianna@google.com>
Commit-Queue: Victor Vianna <victorvianna@google.com>
Cr-Commit-Position: refs/heads/master@{#805763}

components/signin/public/android/java/src/org/chromium/components/signin/identitymanager/IdentityManager.java

@@ -146,7 +146,7 @@ public class IdentityManager {
     }
 
     /**
-     * Looks up and returns information for account with given |email_address|. If the account
+     * Looks up and returns information for account with given |email|. If the account
      * cannot be found, return a null value.
      */
     public @Nullable CoreAccountInfo

components/signin/public/android/java/src/org/chromium/components/signin/identitymanager/IdentityMutator.java

@@ -37,7 +37,7 @@ public class IdentityMutator {
     }
 
     /**
-     * Marks the account with |account_id| as the primary account, and returns whether the operation
+     * Marks the account with |accountId| as the primary account, and returns whether the operation
      * succeeded or not. To succeed, this requires that:
      *   - the account is known by the IdentityManager.
      *   - setting the primary account is allowed,