Add new extension APIs related to animation policy.

chrome/browser/chrome_content_browser_client.cc

Index: chrome/browser/chrome_content_browser_client.cc
diff --git a/chrome/browser/chrome_content_browser_client.cc b/chrome/browser/chrome_content_browser_client.cc
index 67c75bc3ae0bdf466b05544dd59c0e5f8a82fa1f..80bec314a4f2796bce1fa010d3846ab9b4e97dcf 100644
--- a/chrome/browser/chrome_content_browser_client.cc
+++ b/chrome/browser/chrome_content_browser_client.cc
@@ -2331,6 +2331,14 @@ void ChromeContentBrowserClient::OverrideWebkitPrefs(
   web_prefs->hyperlink_auditing_enabled =
       prefs->GetBoolean(prefs::kEnableHyperlinkAuditing);
 
+  std::string image_animation_policy = prefs->GetString(prefs::kAnimationPolicy);

[not at google - send to devlin, 2014/12/11 17:48:15]

Please run git cl format over this CL.

[je_julie(Not used), 2014/12/12 13:15:45]

I ran git cl format with new patchset.

+  if (image_animation_policy == "once")
+    web_prefs->animation_policy = content::IMAGE_ANIMATION_POLICY_ANIMATION_ONCE;
+  else if (image_animation_policy == "none")
+    web_prefs->animation_policy = content::IMAGE_ANIMATION_POLICY_NO_ANIMATION;
+  else
+    web_prefs->animation_policy = content::IMAGE_ANIMATION_POLICY_ALLOWED;
+
   // Make sure we will set the default_encoding with canonical encoding name.
   web_prefs->default_encoding =
       CharacterEncoding::GetCanonicalEncodingNameByAliasName(