Clean content_settings_pattern_parser.* from unnecessary dependencies.

chrome/browser/content_settings/content_settings_rule_unittest.cc

Index: chrome/browser/content_settings/content_settings_rule_unittest.cc
diff --git a/chrome/browser/content_settings/content_settings_rule_unittest.cc b/chrome/browser/content_settings/content_settings_rule_unittest.cc
index 0ec57b17128d165b729415c266cbf530f9382318..29797d592f2fcd67bbc5336bdb4b133a7b613850 100644
--- a/chrome/browser/content_settings/content_settings_rule_unittest.cc
+++ b/chrome/browser/content_settings/content_settings_rule_unittest.cc
@@ -4,6 +4,7 @@
 
 #include <list>
 
+#include "chrome/common/content_settings_component.h"
 #include "chrome/common/content_settings_pattern.h"
 #include "chrome/browser/content_settings/content_settings_rule.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -39,6 +40,7 @@ class ListIterator : public RuleIterator {
 }  // namespace
 
 TEST(RuleTest, ConcatenationIterator) {
+  InitContentSettingsComponent();
   std::list<Rule> rules1;
   rules1.push_back(Rule(ContentSettingsPattern::FromString("a"),
                         ContentSettingsPattern::Wildcard(),