Delegating the "are images allowed" decision to renderer.

chrome/common/render_messages.h

Index: chrome/common/render_messages.h
diff --git a/chrome/common/render_messages.h b/chrome/common/render_messages.h
index 03ca1aa8c783cff93c2c994b94a36c920c61bd15..379405ff0585f2febbc59101b005f7426673fe9c 100644
--- a/chrome/common/render_messages.h
+++ b/chrome/common/render_messages.h
@@ -19,6 +19,7 @@
 #include "base/values.h"
 #include "build/build_config.h"
 #include "chrome/common/common_param_traits.h"
+#include "chrome/common/content_settings.h"
 #include "chrome/common/content_settings_pattern.h"
 #include "chrome/common/instant_types.h"
 #include "chrome/common/nacl_types.h"
@@ -138,6 +139,14 @@ IPC_STRUCT_TRAITS_BEGIN(ContentSettingsPattern::PatternParts)
   IPC_STRUCT_TRAITS_MEMBER(path)
 IPC_STRUCT_TRAITS_END()
 
+IPC_STRUCT_TRAITS_BEGIN(ContentSettingPatternSource)
+  IPC_STRUCT_TRAITS_MEMBER(primary_pattern)
+  IPC_STRUCT_TRAITS_MEMBER(secondary_pattern)
+  IPC_STRUCT_TRAITS_MEMBER(setting)
+  IPC_STRUCT_TRAITS_MEMBER(source)
+  IPC_STRUCT_TRAITS_MEMBER(incognito)
+IPC_STRUCT_TRAITS_END()
+
 IPC_STRUCT_TRAITS_BEGIN(ThumbnailScore)
   IPC_STRUCT_TRAITS_MEMBER(boring_score)
   IPC_STRUCT_TRAITS_MEMBER(good_clipping)
@@ -235,6 +244,10 @@ IPC_MESSAGE_CONTROL2(ChromeViewMsg_SetContentSettingsForCurrentURL,
 IPC_MESSAGE_CONTROL1(ChromeViewMsg_SetDefaultContentSettings,
                      ContentSettings /* content_settings */)
 
+// Set the content settings for images.
+IPC_MESSAGE_CONTROL1(ChromeViewMsg_SetImageSettingRules,
+                     ContentSettingsForOneType /* rules */)
+
 // Tells the render view to load all blocked plugins.
 IPC_MESSAGE_ROUTED0(ChromeViewMsg_LoadBlockedPlugins)