Support multi touch on Windows 8 AURA and ASH.

content/browser/renderer_host/render_widget_host_view_aura.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_widget_host_view_aura.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 49 matching lines @@
 #include "ui/base/ui_base_types.h"
 #include "ui/compositor/layer.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/display.h"
 #include "ui/gfx/rect_conversions.h"
 #include "ui/gfx/screen.h"
 #include "ui/gfx/size_conversions.h"
 #include "ui/gfx/skia_util.h"
 
 #if defined(OS_WIN)
+#include "base/win/windows_version.h"
 #include "content/browser/accessibility/browser_accessibility_manager_win.h"
 #include "content/browser/accessibility/browser_accessibility_win.h"
 #include "ui/base/win/hidden_window.h"
 #include "ui/gfx/gdi_util.h"
 #endif
 
 using gfx::RectToSkIRect;
 using gfx::SkIRectToRect;
 
 using WebKit::WebScreenInfo;
@@ skipping 178 matching lines @@
       gfx::Screen::GetScreenFor(window)->GetPrimaryDisplay();
   results->rect = display.bounds();
   results->availableRect = display.work_area();
   // TODO(derat|oshima): Don't hardcode this. Get this from display object.
   results->depth = 24;
   results->depthPerComponent = 8;
   results->deviceScaleFactor = display.device_scale_factor();
 }
 
 bool ShouldSendPinchGesture() {
+#if defined(OS_WIN)
+  if (base::win::GetVersion() >= base::win::VERSION_WIN8)
+    return true;
+#endif
   static bool pinch_allowed =
       CommandLine::ForCurrentProcess()->HasSwitch(switches::kEnableViewport) ||
       CommandLine::ForCurrentProcess()->HasSwitch(switches::kEnablePinch);
   return pinch_allowed;
 }
 
 bool PointerEventActivates(const ui::Event& event) {
   if (event.type() == ui::ET_MOUSE_PRESSED)
     return true;
 
@@ skipping 2391 matching lines @@
     RenderWidgetHost* widget) {
   return new RenderWidgetHostViewAura(widget);
 }
 
 // static
 void RenderWidgetHostViewPort::GetDefaultScreenInfo(WebScreenInfo* results) {
   GetScreenInfoForWindow(results, NULL);
 }
 
 }  // namespace content