Don't set a default Value for content settigns type AutoSelectCertificate

BUG=106149
TEST=DefaultProviderTest*

Review URL: http://codereview.chromium.org/8776044

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@112680 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/content_settings/content_settings_default_provider.cc

@@ -55,6 +55,7 @@ namespace {
 class DefaultRuleIterator : public RuleIterator {
  public:
   explicit DefaultRuleIterator(const base::Value* value) {
+    if (value)
       value_.reset(value->DeepCopy());
   }
 
@@ -316,10 +317,12 @@ void DefaultProvider::ReadDefaultSettings(bool overwrite) {
 void DefaultProvider::ForceDefaultsToBeExplicit() {
   for (int i = 0; i < CONTENT_SETTINGS_NUM_TYPES; ++i) {
     ContentSettingsType type = ContentSettingsType(i);
-    if (!default_settings_[type].get())
+    if (!default_settings_[type].get() &&
+        kDefaultSettings[i] != CONTENT_SETTING_DEFAULT) {
       default_settings_[type].reset(
           Value::CreateIntegerValue(kDefaultSettings[i]));
     }
+  }
 }
 
 void DefaultProvider::GetSettingsFromDictionary(

chrome/browser/content_settings/content_settings_default_provider_unittest.cc

@@ -78,6 +78,15 @@ TEST_F(DefaultProviderTest, DefaultValues) {
                               CONTENT_SETTINGS_TYPE_GEOLOCATION,
                               std::string(),
                               false));
+
+  scoped_ptr<base::Value> value(
+      GetContentSettingValue(&provider_,
+                             GURL("http://example.com/"),
+                             GURL("http://example.com/"),
+                             CONTENT_SETTINGS_TYPE_AUTO_SELECT_CERTIFICATE,
+                             std::string(),
+                             false));
+  EXPECT_FALSE(value.get());
 }
 
 TEST_F(DefaultProviderTest, IgnoreNonDefaultSettings) {