Delegating the "are images allowed" decision to renderer.

chrome/renderer/chrome_render_process_observer.h

Index: chrome/renderer/chrome_render_process_observer.h
diff --git a/chrome/renderer/chrome_render_process_observer.h b/chrome/renderer/chrome_render_process_observer.h
index 7c14c247bb1311ad3ab9105c36a37d7d902802ab..256b762afe9fe24ca24c35d7a3fb0428b9dd32c2 100644
--- a/chrome/renderer/chrome_render_process_observer.h
+++ b/chrome/renderer/chrome_render_process_observer.h
@@ -11,6 +11,7 @@
 #include "base/compiler_specific.h"
 #include "base/file_path.h"
 #include "base/memory/scoped_ptr.h"
+#include "chrome/common/content_settings.h"
 #include "content/public/renderer/render_process_observer.h"
 
 class GURL;
@@ -49,6 +50,7 @@ class ChromeRenderProcessObserver : public content::RenderProcessObserver {
   void OnSetContentSettingsForCurrentURL(
       const GURL& url, const ContentSettings& content_settings);
   void OnSetDefaultContentSettings(const ContentSettings& content_settings);
+  void OnSetImageSettingRules(const ContentSettingsForOneType& settings);
   void OnSetCacheCapacities(size_t min_dead_capacity,
                             size_t max_dead_capacity,
                             size_t capacity);
@@ -69,6 +71,7 @@ class ChromeRenderProcessObserver : public content::RenderProcessObserver {
   chrome::ChromeContentRendererClient* client_;
   // If true, the web cache shall be cleared before the next navigation event.
   bool clear_cache_pending_;
+  ContentSettingsForOneType image_setting_rules_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeRenderProcessObserver);
 };