Remove calls to IsRunningSequenceOnCurrentThread() in wallpaper API.

components/wallpaper/wallpaper_manager_base.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 COMPONENTS_WALLPAPER_WALLPAPER_MANAGER_BASE_H_
 #define COMPONENTS_WALLPAPER_WALLPAPER_MANAGER_BASE_H_
 
 #include <stddef.h>
 
 #include <deque>
@@ skipping 62 matching lines @@
   std::string location;
   WallpaperLayout layout;
   user_manager::User::WallpaperType type;
   base::Time date;
   bool operator==(const WallpaperInfo& other) {
     return (location == other.location) && (layout == other.layout) &&
            (type == other.type);
   }
 };
 
+// Asserts that the current task is sequenced with any other task that calls
+// this.
+void WALLPAPER_EXPORT AssertCalledOnWallpaperSequence();
+
 class WallpaperManagerBrowserTest;
 
 // Name of wallpaper sequence token.
 WALLPAPER_EXPORT extern const char kWallpaperSequenceTokenName[];
 
 // File path suffices of resized small or large wallpaper.
 // TODO(bshe): Use the same sub folder system as custom wallpapers use.
 // crbug.com/174928
 WALLPAPER_EXPORT extern const char kSmallWallpaperSuffix[];
 WALLPAPER_EXPORT extern const char kLargeWallpaperSuffix[];
@@ skipping 511 matching lines @@
 
   base::WeakPtrFactory<WallpaperManagerBase> weak_factory_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(WallpaperManagerBase);
 };
 
 }  // namespace wallpaper
 
 #endif  // COMPONENTS_WALLPAPER_WALLPAPER_MANAGER_BASE_H_