Let ui::TouchEvent carry LatencyInfo

    
With this patch, ui::Event will carry the LatencyInfo. And we specifically
track key timestamps in LatencyInfo for ui::TouchEvent when the event is
passed around:
    
When ui::TouchEvent is created we put 2 timestamps:
    
INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT : The original timestamp the
event carries from the OS (e.g. kernel timestamp in CrOS case)
    
INPUT_EVENT_LATENCY_UI_COMPONENT : The timestamp when the ui::TouchEvent
is created.
    
Also when ui::TouchEvent is recreated from WebInputEvent (when touch
event queue pops the touch event to view), we set a timestamp in component
INPUT_EVENT_LATENCY_ACKED_COMPONENT.
    
Also move
"content/browser/renderer_host/event_with_latency_info.h"
to
"content/port/browser/event_with_latency_info.h"
    
BUG=chromium:246034
TEST=it compiles. content_unittests pass.

Review URL: https://chromiumcodereview.appspot.com/16911002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@207116 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 44 insertions, 1 deletions

diff --git a/content/port/browser/event_with_latency_info.h b/content/port/browser/event_with_latency_info.h
new file mode 100644
index 0000000..70788f9
--- /dev/null
+++ b/content/port/browser/event_with_latency_info.h
@@ -0,0 +1,42 @@
+// Copyright 2013 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.
+
+#ifndef CONTENT_PORT_BROWSER_EVENT_WITH_LATENCY_INFO_H_
+#define CONTENT_PORT_BROWSER_EVENT_WITH_LATENCY_INFO_H_
+
+#include "ui/base/latency_info.h"
+
+namespace WebKit {
+class WebGestureEvent;
+class WebMouseEvent;
+class WebMouseWheelEvent;
+class WebTouchEvent;
+}
+
+namespace content {
+
+template <typename T>
+class EventWithLatencyInfo {
+ public:
+  T event;
+  ui::LatencyInfo latency;
+
+  EventWithLatencyInfo(const T& e, const ui::LatencyInfo& l)
+      : event(e), latency(l) {}
+
+  EventWithLatencyInfo() {}
+};
+
+typedef EventWithLatencyInfo<WebKit::WebGestureEvent>
+    GestureEventWithLatencyInfo;
+typedef EventWithLatencyInfo<WebKit::WebMouseWheelEvent>
+    MouseWheelEventWithLatencyInfo;
+typedef EventWithLatencyInfo<WebKit::WebMouseEvent>
+    MouseEventWithLatencyInfo;
+typedef EventWithLatencyInfo<WebKit::WebTouchEvent>
+    TouchEventWithLatencyInfo;
+
+}  // namespace content
+
+#endif  // CONTENT_PORT_BROWSER_EVENT_WITH_LATENCY_INFO_H_
diff --git a/content/port/browser/render_widget_host_view_port.h b/content/port/browser/render_widget_host_view_port.h
index ddfaffb..9b1f7fc 100644
--- a/content/port/browser/render_widget_host_view_port.h
+++ b/content/port/browser/render_widget_host_view_port.h
@@ -10,6 +10,7 @@
 #include "base/strings/string16.h"
 #include "cc/output/compositor_frame.h"
 #include "content/common/content_export.h"
+#include "content/port/browser/event_with_latency_info.h"
 #include "content/port/common/input_event_ack_state.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "ipc/ipc_listener.h"
@@ -258,7 +259,7 @@ class CONTENT_EXPORT RenderWidgetHostViewPort : public RenderWidgetHostView,
   // the GestureRecognizer until invocation of ProcessAckedTouchEvent releases
   // it to be consumed (when |ack_result| is NOT_CONSUMED OR NO_CONSUMER_EXISTS)
   // or ignored (when |ack_result| is CONSUMED).
-  virtual void ProcessAckedTouchEvent(const WebKit::WebTouchEvent& touch,
+  virtual void ProcessAckedTouchEvent(const TouchEventWithLatencyInfo& touch,
                                       InputEventAckState ack_result) = 0;
 
   // Asks the view to create a smooth scroll gesture that will be used to