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

Source/web/WebDevToolsAgentImpl.cpp

Index: Source/web/WebDevToolsAgentImpl.cpp
diff --git a/Source/web/WebDevToolsAgentImpl.cpp b/Source/web/WebDevToolsAgentImpl.cpp
index e8a14b55eed44580763101b5868618e182725065..2256ead3080175b246e25c1f4dfc2ca87c327985 100644
--- a/Source/web/WebDevToolsAgentImpl.cpp
+++ b/Source/web/WebDevToolsAgentImpl.cpp
@@ -209,6 +209,7 @@ WebDevToolsAgentImpl::WebDevToolsAgentImpl(
     , m_touchEventEmulationEnabled(false)
     , m_originalTouchEnabled(false)
     , m_originalDeviceSupportsMouse(false)
+    , m_originalDeviceSupportsTouch(false)
 {
     ASSERT(m_hostId > 0);
     ClientMessageLoopAdapter::ensureClientMessageLoopCreated(m_client);
@@ -389,12 +390,16 @@ void WebDevToolsAgentImpl::setTouchEventEmulationEnabled(bool enabled)
 
     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();