Newly created profiles should have the grey silhouette as avatar.

chrome/browser/profiles/profile_avatar_icon_util.h

Index: chrome/browser/profiles/profile_avatar_icon_util.h
diff --git a/chrome/browser/profiles/profile_avatar_icon_util.h b/chrome/browser/profiles/profile_avatar_icon_util.h
index 960b735ee9da35adb992bf4d69663d8ce1ae674c..1ed780330da5ff595bd41eab15c2382dfcaa2ca3 100644
--- a/chrome/browser/profiles/profile_avatar_icon_util.h
+++ b/chrome/browser/profiles/profile_avatar_icon_util.h
@@ -25,6 +25,12 @@ extern const SkColor kAvatarBubbleAccountsBackgroundColor;
 // Gets the number of default avatar icons that exist.
 size_t GetDefaultAvatarIconCount();
 
+// Gets the index for the (grey silhouette) avatar used as a placeholder.
+int GetPlaceholderAvatarIndex();
+
+// Gets the resource ID of the placeholder avatar icon.
+int GetPlaceholderAvatarIconResourceID();
+
 // Gets the number of generic avatar icons that exist.
 size_t GetGenericAvatarIconCount();
 
@@ -34,6 +40,9 @@ int GetDefaultAvatarIconResourceIDAtIndex(size_t index);
 // Gets the resource filename of the default avatar icon at |index|.
 const char* GetDefaultAvatarIconFileNameAtIndex(size_t index);
 
+// Gets the file name of an avatar that has no high res version.
+const char* GetNoHighResAvatarFileName();
+
 // Returns a URL for the default avatar icon with specified index.
 std::string GetDefaultAvatarIconUrl(size_t index);