Add new extension APIs related to animation policy.

content/public/common/web_preferences.h

Index: content/public/common/web_preferences.h
diff --git a/content/public/common/web_preferences.h b/content/public/common/web_preferences.h
index ab43cd90a57bb76e552c3d84d7ba3148cb2021e9..ade3753e8f2d941a63263fcfcad35abccb1deadc 100644
--- a/content/public/common/web_preferences.h
+++ b/content/public/common/web_preferences.h
@@ -58,6 +58,18 @@ enum V8ScriptStreamingMode {
       V8_SCRIPT_STREAMING_MODE_ALL_PLUS_BLOCK_PARSER_BLOCKING
 };
 
+#if defined(ENABLE_EXTENSIONS)

[jam, 2015/02/03 16:27:01]

extensions is a chrome concept, which content module doesn't know about.

so remove the ifdefs in content. content just exposes settings and its up to
embedders to set them depending on things like extensions etc...

[je_julie(Not used), 2015/02/04 02:20:30]

Done.

+// ImageAnimationPolicy is used for controlling image animation
+// when image frame is rendered for animation.
+// See third_party/WebKit/Source/platform/graphics/ImageAnimationPolicy.h
+// for information on the options.
+enum ImageAnimationPolicy {
+  IMAGE_ANIMATION_POLICY_ALLOWED,
+  IMAGE_ANIMATION_POLICY_ANIMATION_ONCE,
+  IMAGE_ANIMATION_POLICY_NO_ANIMATION
+};
+#endif
+
 // The ISO 15924 script code for undetermined script aka Common. It's the
 // default used on WebKit's side to get/set a font setting when no script is
 // specified.
@@ -195,6 +207,10 @@ struct CONTENT_EXPORT WebPreferences {
   // pepper plugins. Defaults to false.
   bool pepper_accelerated_video_decode_enabled;
 
+#if defined(ENABLE_EXTENSIONS)
+  ImageAnimationPolicy animation_policy;
+#endif
+
 #if defined(OS_ANDROID)
   bool text_autosizing_enabled;
   float font_scale_factor;