[DevTools] Switch from blink-based to content-based touch emulation.

Source/web/InspectorClientImpl.cpp

Index: Source/web/InspectorClientImpl.cpp
diff --git a/Source/web/InspectorClientImpl.cpp b/Source/web/InspectorClientImpl.cpp
index 42521e37adb6af95f1c4bee881a0e5a87751f2bf..7c7e3bf1c3130dfc4d48abb3e15ab5e6c3a47208 100644
--- a/Source/web/InspectorClientImpl.cpp
+++ b/Source/web/InspectorClientImpl.cpp
@@ -107,6 +107,12 @@ void InspectorClientImpl::overrideDeviceMetrics(int width, int height, float dev
         agent->overrideDeviceMetrics(width, height, deviceScaleFactor, emulateViewport, fitWindow);
 }
 
+void InspectorClientImpl::setTouchEventEmulationEnabled(bool enabled)
+{
+    if (WebDevToolsAgentImpl* agent = devToolsAgent())
+        agent->setTouchEventEmulationEnabled(enabled);
+}
+
 bool InspectorClientImpl::overridesShowPaintRects()
 {
     return m_inspectedWebView->isAcceleratedCompositingActive();