Fix header guard and namespace in android_webview

android_webview/browser/parent_compositor_draw_constraints.cc

 // Copyright 2014 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 "android_webview/browser/parent_compositor_draw_constraints.h"
 
 #include "android_webview/browser/child_frame.h"
 
 namespace android_webview {
 
@@ skipping 17 matching lines @@
   }
 
   // Viewport for tile priority does not depend on surface rect in this case.
   if (frame.offscreen_pre_raster || is_layer)
     return false;
 
   // Workaround for corner case. See crbug.com/417479.
   return frame.viewport_rect_for_tile_priority_empty && !surface_rect_empty;
 }
 
-}  // namespace webview
+}  // namespace android_webview