Remove DCHECK_IMPLIES and CHECK_IMPLIES

cc/tiles/tile_manager.cc

Index: cc/tiles/tile_manager.cc
diff --git a/cc/tiles/tile_manager.cc b/cc/tiles/tile_manager.cc
index e92a3df33b30d368d9a0058b51b60785663f0eba..5574026c7c35ca86bec2328c3c5dfd243d72b0df 100644
--- a/cc/tiles/tile_manager.cc
+++ b/cc/tiles/tile_manager.cc
@@ -545,8 +545,8 @@ void TileManager::AssignGpuMemoryToTiles(
 
     tile->scheduled_priority_ = schedule_priority++;
 
-    DCHECK_IMPLIES(tile->draw_info().mode() != TileDrawInfo::OOM_MODE,
-                   !tile->draw_info().IsReadyToDraw());
+    DCHECK(tile->draw_info().mode() == TileDrawInfo::OOM_MODE ||
+           !tile->draw_info().IsReadyToDraw());
 
     // If the tile already has a raster_task, then the memory used by it is
     // already accounted for in memory_usage. Otherwise, we'll have to acquire
@@ -856,8 +856,8 @@ bool TileManager::AreRequiredTilesReadyToDraw(
       client_->BuildRasterQueue(global_state_.tree_priority, type));
   for (; !all_queue->IsEmpty(); all_queue->Pop()) {
     Tile* tile = all_queue->Top().tile();
-    DCHECK_IMPLIES(tile->required_for_activation(),
-                   tile->draw_info().IsReadyToDraw());
+    DCHECK(!tile->required_for_activation() ||
+           tile->draw_info().IsReadyToDraw());
   }
 #endif
   return true;