Remove the DownloadItem::TogglePause() interface.

content/browser/download/download_item_impl.cc

 // Copyright (c) 2012 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.
 
 // File method ordering: Methods in this file are in the same order as
 // in download_item_impl.h, with the following exception: The public
 // interface Start is placed in chronological order with the other
 // (private) routines that together define a DownloadItem's state
 // transitions as the download progresses.  See "Download progression
 // cascade" later in this file.
@@ skipping 301 matching lines @@
   bound_net_log_.AddEvent(
       net::NetLog::TYPE_DOWNLOAD_ITEM_SAFETY_STATE_UPDATED,
       base::Bind(&ItemCheckedNetLogCallback,
                  GetDangerType(), GetSafetyState()));
 
   UpdateObservers();
 
   MaybeCompleteDownload();
 }
 
-void DownloadItemImpl::TogglePause() {
+void DownloadItemImpl::Pause() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  DCHECK(state_ == IN_PROGRESS_INTERNAL || state_ == COMPLETING_INTERNAL);
-  VLOG(20) << __FUNCTION__ << " download=" << DebugString(true);
 
-  // Ignore pauses when we've passed the commit point.
-  if (state_ == COMPLETING_INTERNAL)
+  // Ignore irrelevant states.
+  if (state_ != IN_PROGRESS_INTERNAL || is_paused_)
     return;
 
-  if (is_paused_)
-    request_handle_->ResumeRequest();
-  else
-    request_handle_->PauseRequest();
-  is_paused_ = !is_paused_;
+  request_handle_->PauseRequest();
+  is_paused_ = true;
   UpdateObservers();
 }
 
+void DownloadItemImpl::Resume() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  // Ignore irrelevant states.
+  if (state_ != IN_PROGRESS_INTERNAL || !is_paused_)
+    return;
+
+  request_handle_->ResumeRequest();
+  is_paused_ = false;
+  UpdateObservers();
+}
+
 void DownloadItemImpl::Cancel(bool user_cancel) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   last_reason_ = user_cancel ?
       DOWNLOAD_INTERRUPT_REASON_USER_CANCELED :
       DOWNLOAD_INTERRUPT_REASON_USER_SHUTDOWN;
 
   VLOG(20) << __FUNCTION__ << "() download = " << DebugString(true);
   if (state_ != IN_PROGRESS_INTERNAL) {
     // Small downloads might be complete before this method has
@@ skipping 1064 matching lines @@
       return "CANCELLED";
     case INTERRUPTED_INTERNAL:
       return "INTERRUPTED";
     default:
       NOTREACHED() << "Unknown download state " << state;
       return "unknown";
   };
 }
 
 }  // namespace content