Add a global on/off switch for content settings and expose a toggle on the Website Settings options…

chrome/browser/content_settings/host_content_settings_map.h

Index: chrome/browser/content_settings/host_content_settings_map.h
diff --git a/chrome/browser/content_settings/host_content_settings_map.h b/chrome/browser/content_settings/host_content_settings_map.h
index 0331d4f0cff3e2e19054e0d0f95383178c9a0cbc..dbe70c0d1338efa0a2685c37a16b9648c85e6696 100644
--- a/chrome/browser/content_settings/host_content_settings_map.h
+++ b/chrome/browser/content_settings/host_content_settings_map.h
@@ -18,6 +18,7 @@
 #include "base/prefs/pref_change_registrar.h"
 #include "base/threading/platform_thread.h"
 #include "base/tuple.h"
+#include "chrome/browser/content_settings/content_settings_override_provider.h"
 #include "components/content_settings/core/browser/content_settings_observer.h"
 #include "components/content_settings/core/common/content_settings.h"
 #include "components/content_settings/core/common/content_settings_pattern.h"
@@ -33,6 +34,7 @@ class Value;
 }
 
 namespace content_settings {
+class OverrideProvider;
 class ObservableProvider;
 class ProviderInterface;
 class PrefProvider;
@@ -53,6 +55,7 @@ class HostContentSettingsMap
     INTERNAL_EXTENSION_PROVIDER = 0,
     POLICY_PROVIDER,
     CUSTOM_EXTENSION_PROVIDER,
+    OVERRIDE_PROVIDER,
     PREF_PROVIDER,
     DEFAULT_PROVIDER,
     NUM_PROVIDER_TYPES,
@@ -99,9 +102,8 @@ class HostContentSettingsMap
   // setting, NULL is returned and the |source| field of |info| is set to
   // |SETTING_SOURCE_NONE|. The pattern fiels of |info| are set to empty
   // patterns.
-  // The ownership of the resulting |Value| is transfered to the caller.
   // May be called on any thread.
-  base::Value* GetWebsiteSetting(
+  scoped_ptr<base::Value> GetWebsiteSetting(
       const GURL& primary_url,
       const GURL& secondary_url,
       ContentSettingsType content_type,
@@ -250,6 +252,31 @@ class HostContentSettingsMap
       const ContentSettingsPattern& secondary_pattern,
       ContentSettingsType content_type);
 
+  // Returns the content setting without considering the global on/off toggle
+  // for the content setting that matches the URLs.
+  ContentSetting GetContentSettingWithoutOverride(
+      const GURL& primary_url,
+      const GURL& secondary_url,
+      ContentSettingsType content_type,
+      const std::string& resource_identifier);
+
+  // Returns the single content setting |value| without considering the
+  // global on/off toggle for the content setting that matches the given
+  // patterns.
+  scoped_ptr<base::Value> GetWebsiteSettingWithoutOverride(
+      const GURL& primary_url,
+      const GURL& secondary_url,
+      ContentSettingsType content_type,
+      const std::string& resource_identifier,
+      content_settings::SettingInfo* info) const;
+
+  // Sets globally if a given |content_type| |is_enabled|.
+  void SetContentSettingOverride(ContentSettingsType content_type,
+                                 bool is_enabled);
+
+  // Returns if a given |content_type| is enabled.
+  bool GetContentSettingOverride(ContentSettingsType content_type);
+
   // Adds/removes an observer for content settings changes.
   void AddObserver(content_settings::Observer* observer);
   void RemoveObserver(content_settings::Observer* observer);
@@ -294,6 +321,16 @@ class HostContentSettingsMap
   // it is not being called too late.
   void UsedContentSettingsProviders() const;
 
+  // Returns the single content setting |value| with a toggle for if it
+  // takes the global on/off switch into account.
+  scoped_ptr<base::Value> GetWebsiteSettingInternal(
+      const GURL& primary_url,
+      const GURL& secondary_url,
+      ContentSettingsType content_type,
+      const std::string& resource_identifier,
+      content_settings::SettingInfo* info,
+      bool get_override) const;
+
   content_settings::PrefProvider* GetPrefProvider();
 
 #ifndef NDEBUG