Experimental viewport meta tag support for desktop

content/browser/renderer_host/render_view_host_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.
 
 #include "content/browser/renderer_host/render_view_host_impl.h"
 
 #include <set>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 490 matching lines @@
 #if defined(OS_CHROMEOS)
   prefs.gesture_tap_highlight_enabled = !command_line.HasSwitch(
       switches::kDisableGestureTapHighlight);
 #else
   prefs.gesture_tap_highlight_enabled = command_line.HasSwitch(
       switches::kEnableGestureTapHighlight);
 #endif
 
   prefs.number_of_cpu_cores = base::SysInfo::NumberOfProcessors();
 
-  prefs.viewport_enabled = command_line.HasSwitch(switches::kEnableViewport);
+  prefs.viewport_meta_enabled =
+      command_line.HasSwitch(switches::kEnableViewportMeta);
+
+  prefs.viewport_enabled =
+      command_line.HasSwitch(switches::kEnableViewport) ||
+      prefs.viewport_meta_enabled;
+
+  prefs.main_frame_resizes_are_orientation_changes =
+      command_line.HasSwitch(switches::kMainFrameResizesAreOrientationChanges);
 
   prefs.deferred_image_decoding_enabled =
       command_line.HasSwitch(switches::kEnableDeferredImageDecoding) ||
       cc::switches::IsImplSidePaintingEnabled();
 
   prefs.spatial_navigation_enabled = command_line.HasSwitch(
       switches::kEnableSpatialNavigation);
 
   GetContentClient()->browser()->OverrideWebkitPrefs(this, url, &prefs);
 
@@ skipping 1747 matching lines @@
 void RenderViewHostImpl::AttachToFrameTree() {
   FrameTree* frame_tree = delegate_->GetFrameTree();
 
   frame_tree->SwapMainFrame(main_render_frame_host_.get());
   if (main_frame_id() != FrameTreeNode::kInvalidFrameId) {
     frame_tree->OnFirstNavigationAfterSwap(main_frame_id());
   }
 }
 
 }  // namespace content