Revert of Remove DCHECK_IMPLIES/CHECK_IMPLIES.

content/browser/frame_host/render_frame_host_impl.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 "content/browser/frame_host/render_frame_host_impl.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/containers/hash_tables.h"
 #include "base/lazy_instance.h"
@@ skipping 2047 matching lines @@
   static uint64 next_id = 1;
   uint64 key = next_id++;
   Send(new FrameMsg_VisualStateRequest(routing_id_, key));
   visual_state_callbacks_.insert(std::make_pair(key, callback));
 }
 
 bool RenderFrameHostImpl::IsRenderFrameLive() {
   bool is_live = GetProcess()->HasConnection() && render_frame_created_;
 
   // Sanity check: the RenderView should always be live if the RenderFrame is.
-  DCHECK(!is_live || render_view_host_->IsRenderViewLive());
+  DCHECK_IMPLIES(is_live, render_view_host_->IsRenderViewLive());
 
   return is_live;
 }
 
 #if defined(OS_WIN)
 
 void RenderFrameHostImpl::SetParentNativeViewAccessible(
     gfx::NativeViewAccessible accessible_parent) {
   RenderWidgetHostViewBase* view = static_cast<RenderWidgetHostViewBase*>(
       render_view_host_->GetWidget()->GetView());
@@ skipping 206 matching lines @@
   *dst = src;
 
   if (src.routing_id != -1)
     dst->tree_id = RoutingIDToAXTreeID(src.routing_id);
 
   if (src.parent_routing_id != -1)
     dst->parent_tree_id = RoutingIDToAXTreeID(src.parent_routing_id);
 }
 
 }  // namespace content