DLP: Support Warn in DlpRulesManager

- Added warn as one of the restriction levels,
and add the required unittests.
- Renamed the urls and patterns in the unittests
to reduce confusion.

Bug: 1169080
Change-Id: I806d1fb7aa8a4c94cd47b02e5be3a8636b2e26ca
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2642776
Commit-Queue: Aya Elsayed <ayaelattar@chromium.org>
Reviewed-by: Sergey Poromov <poromov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#846038}

chrome/browser/chromeos/policy/dlp/dlp_policy_constants.h

@@ -23,6 +23,7 @@ constexpr char kPluginVm[] = "PLUGIN_VM";
 
 constexpr char kAllowLevel[] = "ALLOW";
 constexpr char kBlockLevel[] = "BLOCK";
+constexpr char kWarnLevel[] = "WARN";
 
 }  // namespace dlp
 

chrome/browser/chromeos/policy/dlp/dlp_rules_manager.h

@@ -48,7 +48,8 @@ class DlpRulesManager : public KeyedService {
     kNotSet,  // Restriction level is not set.
     kBlock,   // Sets the restriction level to block the user on every action.
     kAllow,   // Sets the restriction level to allow (no restriction).
-    kMaxValue = kAllow
+    kWarn,    // Sets the restriction level to warn the user on every action.
+    kMaxValue = kWarn
   };
 
   ~DlpRulesManager() override = default;

chrome/browser/chromeos/policy/dlp/dlp_rules_manager_impl.cc

@@ -52,7 +52,8 @@ DlpRulesManager::Level GetLevelMapping(const std::string& level) {
   static constexpr auto kLevelsMap =
       base::MakeFixedFlatMap<base::StringPiece, DlpRulesManager::Level>(
           {{dlp::kAllowLevel, DlpRulesManager::Level::kAllow},
-           {dlp::kBlockLevel, DlpRulesManager::Level::kBlock}});
+           {dlp::kBlockLevel, DlpRulesManager::Level::kBlock},
+           {dlp::kWarnLevel, DlpRulesManager::Level::kWarn}});
   auto* it = kLevelsMap.find(level);
   return (it == kLevelsMap.end()) ? DlpRulesManager::Level::kNotSet
                                   : it->second;
@@ -75,8 +76,9 @@ uint8_t GetPriorityMapping(const DlpRulesManager::Level level) {
   static constexpr auto kPrioritiesMap =
       base::MakeFixedFlatMap<DlpRulesManager::Level, uint8_t>(
           {{DlpRulesManager::Level::kNotSet, 0},
-           {DlpRulesManager::Level::kBlock, 1},
-           {DlpRulesManager::Level::kAllow, 2}});
+           {DlpRulesManager::Level::kWarn, 1},
+           {DlpRulesManager::Level::kBlock, 2},
+           {DlpRulesManager::Level::kAllow, 3}});
   return kPrioritiesMap.at(level);
 }