favor DCHECK_CURRENTLY_ON for better logs in chrome/browser/chromeos/

chrome/browser/chromeos/extensions/wallpaper_function_base.cc

 // Copyright 2013 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.
 
 #include "chrome/browser/chromeos/extensions/wallpaper_function_base.h"
 
 #include "base/synchronization/cancellation_flag.h"
 #include "chrome/browser/image_decoder.h"
 #include "chrome/grit/generated_resources.h"
 #include "chromeos/login/login_state.h"
@@ skipping 31 matching lines @@
 }  // namespace wallpaper_api_util
 
 class WallpaperFunctionBase::UnsafeWallpaperDecoder
     : public ImageDecoder::Delegate {
  public:
   explicit UnsafeWallpaperDecoder(scoped_refptr<WallpaperFunctionBase> function)
       : function_(function) {
   }
 
   void Start(const std::vector<char>& image_data) {
-    DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+    DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
     // This function can only be called after user login. It is fine to use
     // unsafe image decoder here. Before user login, a robust jpeg decoder will
     // be used.
     CHECK(chromeos::LoginState::Get()->IsUserLoggedIn());
     unsafe_image_decoder_ = new ImageDecoder(this, image_data,
                                              ImageDecoder::DEFAULT_CODEC);
     unsafe_image_decoder_->set_shrink_to_fit(true);
 
     scoped_refptr<base::MessageLoopProxy> task_runner =
@@ skipping 39 matching lines @@
 WallpaperFunctionBase::UnsafeWallpaperDecoder*
     WallpaperFunctionBase::unsafe_wallpaper_decoder_;
 
 WallpaperFunctionBase::WallpaperFunctionBase() {
 }
 
 WallpaperFunctionBase::~WallpaperFunctionBase() {
 }
 
 void WallpaperFunctionBase::StartDecode(const std::vector<char>& data) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
   if (unsafe_wallpaper_decoder_)
     unsafe_wallpaper_decoder_->Cancel();
   unsafe_wallpaper_decoder_ = new UnsafeWallpaperDecoder(this);
   unsafe_wallpaper_decoder_->Start(data);
 }
 
 void WallpaperFunctionBase::OnCancel() {
   unsafe_wallpaper_decoder_ = NULL;
   SetError(wallpaper_api_util::kCancelWallpaperMessage);
   SendResponse(false);
 }
 
 void WallpaperFunctionBase::OnFailure(const std::string& error) {
   unsafe_wallpaper_decoder_ = NULL;
   SetError(error);
   SendResponse(false);
 }