[DevTools] Disable touch emulation on devices with touch input.

Source/web/WebDevToolsAgentImpl.cpp

 /*
  * Copyright (C) 2010-2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 191 matching lines @@
     , m_webViewImpl(webViewImpl)
     , m_attached(false)
     , m_generatingEvent(false)
     , m_deviceMetricsEnabled(false)
     , m_emulateViewportEnabled(false)
     , m_originalViewportEnabled(false)
     , m_isOverlayScrollbarsEnabled(false)
     , m_touchEventEmulationEnabled(false)
     , m_originalTouchEnabled(false)
     , m_originalDeviceSupportsMouse(false)
+    , m_originalDeviceSupportsTouch(false)
 {
     ASSERT(m_hostId > 0);
     ClientMessageLoopAdapter::ensureClientMessageLoopCreated(m_client);
 }
 
 WebDevToolsAgentImpl::~WebDevToolsAgentImpl()
 {
     ClientMessageLoopAdapter::inspectedViewClosed(m_webViewImpl);
     if (m_attached)
         blink::Platform::current()->currentThread()->removeTaskObserver(this);
@@ skipping 160 matching lines @@
     }
 }
 
 void WebDevToolsAgentImpl::setTouchEventEmulationEnabled(bool enabled)
 {
     if (m_touchEventEmulationEnabled == enabled)
         return;
 
     if (!m_touchEventEmulationEnabled) {
         m_originalTouchEnabled = RuntimeEnabledFeatures::touchEnabled();
-        if (m_webViewImpl->page())
+        if (m_webViewImpl->page()) {
             m_originalDeviceSupportsMouse = m_webViewImpl->page()->settings().deviceSupportsMouse();
+            m_originalDeviceSupportsTouch = m_webViewImpl->page()->settings().deviceSupportsTouch();

[pfeldman, 2014/04/21 12:34:00]

Why is this not a part of Page agent?

[dgozman, 2014/04/21 13:25:47]

Moved most to the PageAgent.

+        }
     }
     RuntimeEnabledFeatures::setTouchEnabled(enabled ? true : m_originalTouchEnabled);
-    if (m_webViewImpl->page())
+    if (m_webViewImpl->page()) {
         m_webViewImpl->page()->settings().setDeviceSupportsMouse(enabled ? false : m_originalDeviceSupportsMouse);
+        m_webViewImpl->page()->settings().setDeviceSupportsTouch(enabled ? true : m_originalDeviceSupportsTouch);
+    }
     m_client->setTouchEventEmulationEnabled(enabled, m_emulateViewportEnabled);
     m_touchEventEmulationEnabled = enabled;
     m_webViewImpl->mainFrameImpl()->frame()->view()->layout();
 }
 
 void WebDevToolsAgentImpl::enableViewportEmulation()
 {
     if (m_emulateViewportEnabled)
         return;
     m_emulateViewportEnabled = true;
@@ skipping 311 matching lines @@
         || commandName == InspectorBackendDispatcher::commandName(InspectorBackendDispatcher::kDebugger_removeBreakpointCmd)
         || commandName == InspectorBackendDispatcher::commandName(InspectorBackendDispatcher::kDebugger_setBreakpointsActiveCmd);
 }
 
 void WebDevToolsAgent::processPendingMessages()
 {
     PageScriptDebugServer::shared().runPendingTasks();
 }
 
 } // namespace blink