Add metrics for schemes of content setting exceptions

components/content_settings/core/common/content_settings_pattern_unittest.cc

Index: components/content_settings/core/common/content_settings_pattern_unittest.cc
diff --git a/components/content_settings/core/common/content_settings_pattern_unittest.cc b/components/content_settings/core/common/content_settings_pattern_unittest.cc
index 74e601979446d3c2ef185b6f358f03d05b2ed5f6..c8280b8fcfad6b70d554fcd35abfd411c901da1f 100644
--- a/components/content_settings/core/common/content_settings_pattern_unittest.cc
+++ b/components/content_settings/core/common/content_settings_pattern_unittest.cc
@@ -720,3 +720,21 @@ TEST(ContentSettingsPatternTest, CanonicalizePattern_Legacy) {
   EXPECT_STREQ("", Pattern("*\xC4\x87ira.com").ToString().c_str());
   EXPECT_STREQ("", Pattern("\xC4\x87ira.*").ToString().c_str());
 }
+
+TEST(ContentSettingsPatternTest, Schemes) {
+  EXPECT_EQ(ContentSettingsPattern::SCHEME_HTTP,
+            Pattern("http://www.example.com").GetScheme());
+  EXPECT_EQ(ContentSettingsPattern::SCHEME_HTTPS,
+            Pattern("https://www.example.com").GetScheme());
+  EXPECT_EQ(ContentSettingsPattern::SCHEME_FILE,
+            Pattern("file:///tmp/file.html").GetScheme());
+  EXPECT_EQ(ContentSettingsPattern::SCHEME_CHROMEEXTENSION,
+            Pattern("chrome-extension://peoadpeiejnhkmpaakpnompolbglelel/")
+                .GetScheme());
+  EXPECT_EQ(ContentSettingsPattern::SCHEME_WILDCARD,
+            Pattern("192.168.0.1").GetScheme());
+  EXPECT_EQ(ContentSettingsPattern::SCHEME_WILDCARD,
+            Pattern("www.example.com").GetScheme());
+  EXPECT_EQ(ContentSettingsPattern::SCHEME_OTHER,
+            Pattern("filesystem:http://www.google.com/temporary/").GetScheme());
+}