Vibration API: use runtime flag, change from client to platform.

Source/WebKit/chromium/src/WebRuntimeFeatures.cpp

Index: Source/WebKit/chromium/src/WebRuntimeFeatures.cpp
diff --git a/Source/WebKit/chromium/src/WebRuntimeFeatures.cpp b/Source/WebKit/chromium/src/WebRuntimeFeatures.cpp
index 96767821a458d8fdfd676da5d83b692c38e3011d..019574266f19a0f614f222613c94ec4406ee33c6 100644
--- a/Source/WebKit/chromium/src/WebRuntimeFeatures.cpp
+++ b/Source/WebKit/chromium/src/WebRuntimeFeatures.cpp
@@ -602,4 +602,14 @@ bool WebRuntimeFeatures::isInputTypeColorEnabled()
     return RuntimeEnabledFeatures::inputTypeColorEnabled();
 }
 
+void WebRuntimeFeatures::enableVibration(bool enable)
+{
+    RuntimeEnabledFeatures::setVibrationEnabled(enable);
+}
+
+bool WebRuntimeFeatures::isVibrationEnabled()
+{
+    return RuntimeEnabledFeatures::vibrationEnabled();
+}
+
 } // namespace WebKit