1 files changed, 48 insertions, 0 deletions
diff --git a/chromium/content/common/input/input_event_stream_validator.cc b/chromium/content/common/input/input_event_stream_validator.cc
new file mode 100644
index 00000000000..85ac42cb5cf
--- /dev/null
+++ b/chromium/content/common/input/input_event_stream_validator.cc
@@ -0,0 +1,48 @@
+// Copyright 2014 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/common/input/input_event_stream_validator.h"
+
+#include "base/command_line.h"
+#include "base/logging.h"
+#include "content/public/common/content_switches.h"
+#include "third_party/WebKit/public/web/WebInputEvent.h"
+
+using blink::WebInputEvent;
+using blink::WebGestureEvent;
+using blink::WebTouchEvent;
+
+namespace content {
+
+InputEventStreamValidator::InputEventStreamValidator()
+    : enabled_(CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kValidateInputEventStream)) {
+}
+
+InputEventStreamValidator::~InputEventStreamValidator() {
+}
+
+void InputEventStreamValidator::Validate(const WebInputEvent& event) {
+  if (!enabled_)
+    return;
+
+  DCHECK(ValidateImpl(event, &error_msg_)) << error_msg_;
+}
+
+bool InputEventStreamValidator::ValidateImpl(const blink::WebInputEvent& event,
+                                             std::string* error_msg) {
+  DCHECK(error_msg);
+  if (WebInputEvent::isGestureEventType(event.type)) {
+    const WebGestureEvent& gesture = static_cast<const WebGestureEvent&>(event);
+    // TODO(jdduke): Validate touchpad gesture streams.
+    if (gesture.sourceDevice == blink::WebGestureDeviceTouchscreen)
+      return gesture_validator_.Validate(gesture, error_msg);
+  } else if (WebInputEvent::isTouchEventType(event.type)) {
+    const WebTouchEvent& touch = static_cast<const WebTouchEvent&>(event);
+    return touch_validator_.Validate(touch, error_msg);
+  }
+  return true;
+}
+
+}  // namespace content