Add migration code to change existing domain scoped content settings to be origin scoped

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..045688b36f6f714b44b1c3bc71b2119f703caf9f 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 +720,55 @@ TEST(ContentSettingsPatternTest, CanonicalizePattern_Legacy) {
   EXPECT_STREQ("", Pattern("*\xC4\x87ira.com").ToString().c_str());
   EXPECT_STREQ("", Pattern("\xC4\x87ira.*").ToString().c_str());
 }
+
+TEST(ContentSettingsPatternTest, IsGeneratedFromURLDomainScoped) {
+  // These are pattern styles which might be generated from FromURL().
+  EXPECT_TRUE(ContentSettingsPattern::FromString("[*.]example.com")
+                  .IsGeneratedFromURLDomainScoped());
+  EXPECT_TRUE(ContentSettingsPattern::FromString("[*.]google.com:80")
+                  .IsGeneratedFromURLDomainScoped());
+  EXPECT_TRUE(ContentSettingsPattern::FromString("https://[*.]google.com")
+                  .IsGeneratedFromURLDomainScoped());
+  EXPECT_TRUE(ContentSettingsPattern::FromString("https://[*.]google.com:443")
+                  .IsGeneratedFromURLDomainScoped());
+  // These patterns either have an empty host, or have no domain wildcard, so
+  // they can not be generated from FromURL().
+  EXPECT_FALSE(
+      ContentSettingsPattern::FromString("*").IsGeneratedFromURLDomainScoped());
+  EXPECT_FALSE(ContentSettingsPattern::FromString("[*.]")
+                   .IsGeneratedFromURLDomainScoped());
+  EXPECT_FALSE(ContentSettingsPattern::FromString("http://*")
+                   .IsGeneratedFromURLDomainScoped());
+  EXPECT_FALSE(ContentSettingsPattern::FromString("http://*:8080")
+                   .IsGeneratedFromURLDomainScoped());
+  EXPECT_FALSE(ContentSettingsPattern::FromString("*://www.google.com:8080")
+                   .IsGeneratedFromURLDomainScoped());
+  EXPECT_FALSE(ContentSettingsPattern::FromString("www.example.com:8080")
+                   .IsGeneratedFromURLDomainScoped());
+  EXPECT_FALSE(ContentSettingsPattern::FromString("www.google.com/*")
+                   .IsGeneratedFromURLDomainScoped());
+  EXPECT_FALSE(ContentSettingsPattern::FromString("google")
+                   .IsGeneratedFromURLDomainScoped());
+  EXPECT_FALSE(ContentSettingsPattern::FromString("https://www.google.com")
+                   .IsGeneratedFromURLDomainScoped());
+  EXPECT_FALSE(ContentSettingsPattern::FromString("https://www.google.com:443")
+                   .IsGeneratedFromURLDomainScoped());
+}
+
+TEST(ContentSettingsPatternTest, FromDomainToOrigin) {
+  EXPECT_STREQ(
+      "http://example.com:80",
+      ContentSettingsPattern::FromDomainToOrigin(Pattern("[*.]example.com"))
+          .ToString()
+          .c_str());
+  EXPECT_STREQ(
+      "http://example.com:80",
+      ContentSettingsPattern::FromDomainToOrigin(Pattern("[*.]example.com:80"))
+          .ToString()
+          .c_str());
+  EXPECT_STREQ("https://example.com:443",
+               ContentSettingsPattern::FromDomainToOrigin(
+                   Pattern("https://[*.]example.com:443"))
+                   .ToString()
+                   .c_str());
+}