Add ContentSettingsProvider Interface.

chrome/browser/content_settings/content_settings_provider.h

Index: chrome/browser/content_settings/content_settings_provider.h
diff --git a/chrome/browser/content_settings/content_settings_provider.h b/chrome/browser/content_settings/content_settings_provider.h
index b330db82d922028e5fbaa1945dae9dc6606f2909..d58da29714feaefff5a94213596f1139b97a47da 100644
--- a/chrome/browser/content_settings/content_settings_provider.h
+++ b/chrome/browser/content_settings/content_settings_provider.h
@@ -8,8 +8,14 @@
 #define CHROME_BROWSER_CONTENT_SETTINGS_CONTENT_SETTINGS_PROVIDER_H_
 #pragma once
 
+#include <string>
+#include <vector>
+
+#include "chrome/browser/content_settings/content_settings_pattern.h"
 #include "chrome/common/content_settings.h"
 
+class GURL;
+
 namespace content_settings {
 
 class DefaultProviderInterface {
@@ -41,6 +47,73 @@ class DefaultProviderInterface {
       ContentSettingsType content_type) const = 0;
 };
 
+class ProviderInterface {
+ public:
+  typedef std::string ResourceIdentifier;
+
+  struct Rule {
+    Rule() {}
+    Rule(const ContentSettingsPattern& requesting_pattern,
+         const ContentSettingsPattern& embedding_pattern,
+         ContentSetting setting)
+      : requesting_url_pattern(requesting_pattern),
+        embedding_url_pattern(embedding_pattern),
+        content_setting(setting) {}
+
+    const ContentSettingsPattern requesting_url_pattern;
+    const ContentSettingsPattern embedding_url_pattern;
+    ContentSetting content_setting;
+  };
+
+  typedef std::vector<Rule> Rules;
+
+  virtual ~ProviderInterface() {}
+
+  // Returns a single ContentSetting which applies to a given |requesting_url|,
+  // |embedding_url| pair or CONTENT_SETTING_DEFAULT, if no rule applies. For
+  // ContentSettingsTypes that require a resource identifier to be specified,
+  // the |resource_identifier| must be non-empty.
+  //
+  // This may be called on any thread.
+  virtual ContentSetting GetContentSetting(
+      const GURL& requesting_url,
+      const GURL& embedding_url,
+      ContentSettingsType content_type,
+      const ResourceIdentifier& resource_identifier) const = 0;
+
+  // Sets the content setting for a particular |requesting_pattern|,
+  // |embedding_pattern|, |content_type| tuple. For ContentSettingsTypes that
+  // require a resource identifier to be specified, the |resource_identifier|
+  // must be non-empty.
+  //
+  // This should only be called on the UI thread.
+  virtual void SetContentSetting(
+      const ContentSettingsPattern& requesting_url_pattern,
+      const ContentSettingsPattern& embedding_url_pattern,
+      ContentSettingsType content_type,
+      const ResourceIdentifier& resource_identifier,
+      ContentSetting content_setting) = 0;
+
+  // For a given content type, returns all content setting rules with a
+  // non-default setting, mapped to their actual settings.
+  // |content_settings_rules| must be non-NULL. If this provider was created for
+  // the off-the-record profile, it will only return those settings differing
+  // from the corresponding regular provider. For ContentSettingsTypes that
+  // require a resource identifier to be specified, the |resource_identifier|
+  // must be non-empty.
+  //
+  // This may be called on any thread.
+  virtual void GetAllContentSettingsRules(
+      ContentSettingsType content_type,
+      const ResourceIdentifier& resource_identifier,
+      Rules* content_setting_rules) const = 0;
+
+  // Resets all content settings to CONTENT_SETTING_DEFAULT.
+  //
+  // This should only be called on the UI thread.
+  virtual void ClearAllContentSettingsRules() = 0;
+};
+
 }  // namespace content_settings
 
 #endif  // CHROME_BROWSER_CONTENT_SETTINGS_CONTENT_SETTINGS_PROVIDER_H_