Delegating the "are images allowed" decision to renderer.

chrome/renderer/content_settings_observer.cc

Index: chrome/renderer/content_settings_observer.cc
diff --git a/chrome/renderer/content_settings_observer.cc b/chrome/renderer/content_settings_observer.cc
index c89482e6d0bc49b65c2ffc75a21699a8781b12ab..1f1acad3ac884a0c153b59a877c2457b6428d7e3 100644
--- a/chrome/renderer/content_settings_observer.cc
+++ b/chrome/renderer/content_settings_observer.cc
@@ -53,9 +53,11 @@ static bool IsWhitelistedForContentSettings(WebFrame* frame) {
 
 ContentSettings ContentSettingsObserver::default_settings_;
 
-ContentSettingsObserver::ContentSettingsObserver(RenderView* render_view)
+ContentSettingsObserver::ContentSettingsObserver(
+    RenderView* render_view, ContentSettingsForOneType* image_setting_rules)
     : RenderViewObserver(render_view),
       RenderViewObserverTracker<ContentSettingsObserver>(render_view),
+      image_setting_rules_(image_setting_rules),
       plugins_temporarily_allowed_(false) {
   ClearBlockedContentSettings();
 }
@@ -196,16 +198,32 @@ bool ContentSettingsObserver::AllowFileSystem(WebFrame* frame) {
 
 bool ContentSettingsObserver::AllowImages(WebFrame* frame,
                                           bool enabled_per_settings) {
-  if (enabled_per_settings &&
-      AllowContentType(CONTENT_SETTINGS_TYPE_IMAGES)) {
+  if (IsWhitelistedForContentSettings(frame))
     return true;
+
+  if (frame->document().securityOrigin().isEmpty() ||
+      frame->top()->document().securityOrigin().isEmpty()) {
+    DidBlockContentType(CONTENT_SETTINGS_TYPE_IMAGES, std::string());
+    return false;  // Uninitialized document.
   }
 
-  if (IsWhitelistedForContentSettings(frame))
-    return true;
+  bool allow = false;
+  if (enabled_per_settings) {
+    ContentSettingsForOneType::const_iterator it;
+    for (it = image_setting_rules_->begin();
+         it != image_setting_rules_->end(); ++it) {
+      if (it->a.Matches(GURL(frame->document().securityOrigin().toString())) &&
+          it->b.Matches(
+              GURL(frame->top()->document().securityOrigin().toString()))) {
+        allow = (it->c != CONTENT_SETTING_BLOCK);
+        break;
+      }
+    }
+  }
 
-  DidBlockContentType(CONTENT_SETTINGS_TYPE_IMAGES, std::string());
-  return false;  // Other protocols fall through here.
+  if (!allow)
+    DidBlockContentType(CONTENT_SETTINGS_TYPE_IMAGES, std::string());
+  return allow;
 }
 
 bool ContentSettingsObserver::AllowIndexedDB(WebFrame* frame,