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..7e770d8eef6b66af90fb09b7c4e84a55ee187765 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;
@@ -40,6 +41,11 @@ class ChromeRenderProcessObserver : public content::RenderProcessObserver {
   // any 'clear cache' commands that were delayed until the next navigation.
   void ExecutePendingClearCache();
 
+  // Returns a pointer to the image setting rules stored by
+  // |ChromeRenderProcessObserver|. The caller does not take the ownership of
+  // the pointer.
+  const ContentSettingsForOneType* image_setting_rules() const;
+
  private:
   // RenderProcessObserver implementation.
   virtual bool OnControlMessageReceived(const IPC::Message& message) OVERRIDE;
@@ -49,6 +55,7 @@ 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 +76,7 @@ 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);
 };