Added method to retrieve non-random incognito wallpaper.

TBR=ben@chromium.org (for OWNERS on non-ash file).
BUG=none
TEST=none

Review URL: https://chromiumcodereview.appspot.com/9808095

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@128618 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 10 insertions, 0 deletions

diff --git a/ash/desktop_background/desktop_background_resources.cc b/ash/desktop_background/desktop_background_resources.cc
index e60125c..ae06c7c 100644
--- a/ash/desktop_background/desktop_background_resources.cc
+++ b/ash/desktop_background/desktop_background_resources.cc
@@ -564,10 +564,14 @@ const ash::WallpaperInfo kDefaultWallpapers[] = {
 
 const int kDefaultWallpaperCount = arraysize(kDefaultWallpapers);
 
+// TODO(saintlou): These hardcoded indexes, although checked against the size
+// of the array are really hacky.
 #if defined(GOOGLE_CHROME_BUILD)
 const int kLastRandomWallpaperIndex = 12;
+const int kIcognitoWallpaperIndex = 0;
 #else
 const int kDefaultWallpaperIndex = 0;
+const int kIcognitoWallpaperIndex = kDefaultWallpaperIndex;
 #endif
 
 }  // namespace
@@ -584,6 +588,11 @@ int GetDefaultWallpaperIndex() {
 #endif
 }
 
+int GetIncognitoWallpaperIndex() {
+  DCHECK(kIcognitoWallpaperIndex < kDefaultWallpaperCount);
+  return std::min(kIcognitoWallpaperIndex, kDefaultWallpaperCount - 1);
+}
+
 int GetWallpaperCount() {
   return kDefaultWallpaperCount;
 }
diff --git a/ash/desktop_background/desktop_background_resources.h b/ash/desktop_background/desktop_background_resources.h
index 8170b54..d439acd 100644
--- a/ash/desktop_background/desktop_background_resources.h
+++ b/ash/desktop_background/desktop_background_resources.h
@@ -29,6 +29,7 @@ struct ASH_EXPORT WallpaperInfo {
 };
 
 ASH_EXPORT int GetDefaultWallpaperIndex();
+ASH_EXPORT int GetIncognitoWallpaperIndex();
 ASH_EXPORT int GetWallpaperCount();
 ASH_EXPORT const SkBitmap& GetWallpaper(int index);
 ASH_EXPORT const SkBitmap& GetWallpaperThumbnail(int index);