cc: Refactored Tile::GetResourceId

cc/tile_drawing_info.cc

Index: cc/tile_drawing_info.cc
diff --git a/cc/tile_drawing_info.cc b/cc/tile_drawing_info.cc
new file mode 100644
index 0000000000000000000000000000000000000000..ffa4aa640a7ce73b494107e8b2e08e3944f96e59
--- /dev/null
+++ b/cc/tile_drawing_info.cc
@@ -0,0 +1,25 @@
+// 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 "cc/tile_drawing_info.h"
+
+namespace cc {
+
+bool TileDrawingInfo::IsReadyToDraw() const {
+  switch(mode_) {
+    case TEXTURE_MODE:
+      return resource_ &&
+             !initializing_resource_ &&
+             resource_->id();
+    case SOLID_COLOR_MODE:
+    case TRANSPARENT_MODE:
+    case PICTURE_PILE_MODE:
+      return true;
+    default:
+      NOTREACHED();
+      return false;
+  }
+}
+
+} // namespace cc