content: Enable 1-copy rasterizer on all platforms but Android and MacOS.

content/renderer/render_thread_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/renderer/render_thread_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <vector>
@@ skipping 475 matching lines @@
 
   InitSkiaEventTracer();
 
   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
 
   is_impl_side_painting_enabled_ =
       command_line.HasSwitch(switches::kEnableImplSidePainting);
   cc_blink::WebLayerImpl::SetImplSidePaintingEnabled(
       is_impl_side_painting_enabled_);
 
-  is_zero_copy_enabled_ = command_line.HasSwitch(switches::kEnableZeroCopy) &&
-                          !command_line.HasSwitch(switches::kDisableZeroCopy);
+  is_zero_copy_enabled_ = command_line.HasSwitch(switches::kEnableZeroCopy);
 
+#if defined(OS_MACOSX) || defined(OS_ANDROID)
   is_one_copy_enabled_ = command_line.HasSwitch(switches::kEnableOneCopy);
+#else
+  is_one_copy_enabled_ = !command_line.HasSwitch(switches::kDisableOneCopy);
+#endif
 
   if (command_line.HasSwitch(switches::kDisableLCDText)) {
     is_lcd_text_enabled_ = false;
   } else if (command_line.HasSwitch(switches::kEnableLCDText)) {
     is_lcd_text_enabled_ = true;
   } else {
 #if defined(OS_ANDROID)
     is_lcd_text_enabled_ = false;
 #else
     is_lcd_text_enabled_ = true;
@@ skipping 1074 matching lines @@
   hidden_widget_count_--;
 
   if (!GetContentClient()->renderer()->RunIdleHandlerWhenWidgetsHidden()) {
     return;
   }
 
   ScheduleIdleHandler(kLongIdleHandlerDelayMs);
 }
 
 }  // namespace content