Revert of Enable virtual viewport on all platforms

content/browser/gpu/compositor_util.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/gpu/compositor_util.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/metrics/field_trial.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 155 matching lines @@
 bool IsPinchVirtualViewportEnabled() {
   const base::CommandLine& command_line =
       *base::CommandLine::ForCurrentProcess();
 
   // Command line switches take precedence over platform default.
   if (command_line.HasSwitch(cc::switches::kDisablePinchVirtualViewport))
     return false;
   if (command_line.HasSwitch(cc::switches::kEnablePinchVirtualViewport))
     return true;
 
+#if defined(OS_CHROMEOS)
   return true;
+#else
+  return false;
+#endif
 }
 
 bool IsDelegatedRendererEnabled() {
   const base::CommandLine& command_line =
       *base::CommandLine::ForCurrentProcess();
   bool enabled = false;
 
 #if defined(USE_AURA) || defined(OS_MACOSX)
   // Enable on Aura and Mac.
   enabled = true;
@@ skipping 180 matching lines @@
   return problem_list;
 }
 
 base::Value* GetDriverBugWorkarounds() {
   base::ListValue* workaround_list = new base::ListValue();
   GpuDataManagerImpl::GetInstance()->GetDriverBugWorkarounds(workaround_list);
   return workaround_list;
 }
 
 }  // namespace content