Newly created profiles should have the grey silhouette as avatar.

chrome/browser/profiles/profile_avatar_icon_util.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_PROFILES_PROFILE_AVATAR_ICON_UTIL_H_
 #define CHROME_BROWSER_PROFILES_PROFILE_AVATAR_ICON_UTIL_H_
 
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/gfx/image/image.h"
 
 namespace profiles {
 
 // Avatar access.
 extern const char kGAIAPictureFileName[];
 extern const char kHighResAvatarFolderName[];
 
 // Avatar formatting.
 extern const int kAvatarIconWidth;
 extern const int kAvatarIconHeight;
 extern const int kAvatarIconPadding;
 extern const SkColor kAvatarTutorialBackgroundColor;
 extern const SkColor kAvatarTutorialContentTextColor;
 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();
 
 // Gets the resource ID of the default avatar icon at |index|.
 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);
 
 // Checks if |index| is a valid avatar icon index
 bool IsDefaultAvatarIconIndex(size_t index);
 
 // Checks if the given URL points to one of the default avatar icons. If it
 // is, returns true and its index through |icon_index|. If not, returns false.
 bool IsDefaultAvatarIconUrl(const std::string& icon_url, size_t *icon_index);
 // Returns a version of |image| of a specific size. Note that no checks are
@@ skipping 14 matching lines @@
 // Returns a version of |image| suitable for use in title bars. The returned
 // image is scaled to fit |dst_width| and |dst_height|.
 gfx::Image GetAvatarIconForTitleBar(const gfx::Image& image,
                                     bool is_rectangle,
                                     int dst_width,
                                     int dst_height);
 
 }  // namespace profiles
 
 #endif  // CHROME_BROWSER_PROFILES_PROFILE_AVATAR_ICON_UTIL_H_