Ensure Char events sent to pepper indicate the correct timestamp seconds.

content/renderer/render_frame_impl.cc

 // 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.
 
 #include "content/renderer/render_frame_impl.h"
 
 #include <map>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 6445 matching lines @@
     return;
 
   if (!IsPepperAcceptingCompositionEvents()) {
     // For pepper plugins unable to handle IME events, send the plugin a
     // sequence of characters instead.
     base::i18n::UTF16CharIterator iterator(&text);
     int32_t i = 0;
     while (iterator.Advance()) {
       blink::WebKeyboardEvent char_event;
       char_event.type = blink::WebInputEvent::Char;
-      char_event.timeStampSeconds = base::Time::Now().ToDoubleT();
+      char_event.timeStampSeconds =
+          (base::TimeTicks::Now() - base::TimeTicks()).InSecondsF();

[majidvp, 2016/12/08 20:26:33]

nit: Please use ui::EventTimeStampToSeconds to make the conversion to seconds.
Also you might as well use ui::EventTimeForNow() which allows proper mocking of
time during tests.

       char_event.modifiers = 0;
       char_event.windowsKeyCode = text[i];
       char_event.nativeKeyCode = text[i];
 
       const int32_t char_start = i;
       for (; i < iterator.array_pos(); ++i) {
         char_event.text[i - char_start] = text[i];
         char_event.unmodifiedText[i - char_start] = text[i];
       }
 
@@ skipping 194 matching lines @@
   // event target. Potentially a Pepper plugin will receive the event.
   // In order to tell whether a plugin gets the last mouse event and which it
   // is, we set |pepper_last_mouse_event_target_| to null here. If a plugin gets
   // the event, it will notify us via DidReceiveMouseEvent() and set itself as
   // |pepper_last_mouse_event_target_|.
   pepper_last_mouse_event_target_ = nullptr;
 #endif
 }
 
 }  // namespace content