Browser tests for using the new SafeBrowsing protocol (v4)

components/safe_browsing_db/v4_feature_list.h

Index: components/safe_browsing_db/v4_feature_list.h
diff --git a/components/safe_browsing_db/v4_feature_list.h b/components/safe_browsing_db/v4_feature_list.h
index f549a9556ab9ec9da6148facf014b629acffffd0..5d7079aee415980951ef1e97961a4f61212dfadd 100644
--- a/components/safe_browsing_db/v4_feature_list.h
+++ b/components/safe_browsing_db/v4_feature_list.h
@@ -11,18 +11,21 @@ namespace safe_browsing {
 // through Finch.
 namespace V4FeatureList {

[Nathan Parker, 2017/02/10 00:52:37]

I'm not sure this namespace adds much, other than verbiage.  Your choice.

[vakh (use Gerrit instead), 2017/02/10 01:08:16]

Acknowledged.

 
-// Is the PVer4 database manager enabled? Should be true if either of those
-// below are true.
-bool IsLocalDatabaseManagerEnabled();
-
-// Is the PVer4 database being checked for resource reputation? If this returns
-// true, use PVer4 database for CheckBrowseUrl, otherwise use PVer3.
-bool IsV4HybridEnabled();
-
-// Is only the PVer4 database being checked for resource reputation? If this
-// returns true, use PVer4 database for all SafeBrowsing operations, and don't
-// update the PVer3 database at all.  This is the launch configuration.
-bool IsV4OnlyEnabled();
+enum class V4UsageStatus {
+  // The V4 database manager is not even instantiated i.e. is diabled. All
+  // SafeBrowsing operations use PVer3 code.
+  V4_DISABLED,
+
+  // The V4 database manager is instantiated, and performs background updates,
+  // but all SafeBrowsing verdicts are returned using the PVer3 database.
+  V4_INSTANTIATED,
+
+  // Only the V4 database manager is instantiated, PVer3 database manager is
+  // not. All SafeBrowsing verdicts are returned using PVer4 database.
+  V4_ONLY
+};
+
+V4UsageStatus GetV4UsageStatus();
 
 }  // namespace V4FeatureList