Delegating the "are images allowed" decision to renderer.

chrome/renderer/content_settings_observer.h

Index: chrome/renderer/content_settings_observer.h
diff --git a/chrome/renderer/content_settings_observer.h b/chrome/renderer/content_settings_observer.h
index afe0bb9e54909e461e32e11fcb11709cd625fbe6..f9db715210358438a077d16d9f7a9b8f91d6744e 100644
--- a/chrome/renderer/content_settings_observer.h
+++ b/chrome/renderer/content_settings_observer.h
@@ -24,15 +24,15 @@ class ContentSettingsObserver
     : public content::RenderViewObserver,
       public content::RenderViewObserverTracker<ContentSettingsObserver> {
  public:
-  explicit ContentSettingsObserver(content::RenderView* render_view);
+  ContentSettingsObserver(content::RenderView* render_view,
+                          const ContentSettingsForOneType* image_setting_rules);
   virtual ~ContentSettingsObserver();
 
-  // Sets the content settings that back allowScripts(), allowImages(), and
-  // allowPlugins().
+  // Sets the content settings that back allowScripts() and allowPlugins().
   void SetContentSettings(const ContentSettings& settings);
 
-  // Sets the default content settings that back allowScripts(),
-  // allowImages(), and allowPlugins().
+  // Sets the default content settings that back allowScripts() and
+  // allowPlugins().
   static void SetDefaultContentSettings(const ContentSettings& settings);
 
   // Returns the setting for the given type.
@@ -86,11 +86,16 @@ class ContentSettingsObserver
   HostContentSettings host_content_settings_;
 
   // Stores our most up-to-date view of the default content settings.
+  // TODO(marja): Store default settings in |ChromeRenderProcessObserver|.
   static ContentSettings default_settings_;
 
-  // Stores if loading of images, scripts, and plugins is allowed.
+  // Stores if loading of scripts and plugins is allowed.
   ContentSettings current_content_settings_;
 
+  // Stores the rules for image content settings. Owned by
+  // |ChromeRenderProcessObserver|.
+  const ContentSettingsForOneType* image_setting_rules_;
+
   // Stores if images, scripts, and plugins have actually been blocked.
   bool content_blocked_[CONTENT_SETTINGS_NUM_TYPES];