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

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index f68bb2e5666f71404361907fd889992464b5d5cf..b2351d2e8ab5732e86ecb32cc17c6fbbba437293 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -6463,7 +6463,8 @@ void RenderFrameImpl::HandlePepperImeCommit(const base::string16& text) {
     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];