Collapse the API surface on WebInputEvent via accessor functions.

chrome/browser/page_load_metrics/user_input_tracker_unittest.cc

 // Copyright 2016 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 "chrome/browser/page_load_metrics/user_input_tracker.h"
 
 #include "base/time/time.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/WebKit/public/platform/WebInputEvent.h"
 
@@ skipping 192 matching lines @@
   // events are in the past.
   e.setTimeStampSeconds(ToMonotonicallyIncreasingSeconds(
       e.GetTimeStamp() -
       base::TimeDelta::FromMilliseconds(kTooManyEntries * 2)));
 
   // Insert more than kMaxEntries entries. The rate limiting logic should
   // prevent more than kMaxEntries entries from actually being inserted. A
   // DCHECK in OnInputEvent verifies that we don't exceed the expected capacity.
   for (size_t i = 0; i < kTooManyEntries; ++i) {
     tracker.OnInputEvent(e);
-    e.setTimeStampSeconds(e.timeStampSeconds +
+    e.setTimeStampSeconds(e.timeStampSeconds() +
                           base::TimeDelta::FromMilliseconds(1).InSecondsF());
   }
 
   // Do a basic sanity check to make sure we can find events in the tracker.
   EXPECT_NE(base::TimeTicks(),
             tracker.FindMostRecentUserInputEventBefore(base::TimeTicks::Now()));
 }
 
 TEST_F(UserInputTrackerTest, IgnoredEventType) {
   UserInputTracker tracker;
   FakeInputEvent e(blink::WebInputEvent::MouseMove);
   tracker.OnInputEvent(e);
   EXPECT_EQ(base::TimeTicks(), tracker.FindMostRecentUserInputEventBefore(
                                    e.GetTimeStampRounded() +
                                    base::TimeDelta::FromMilliseconds(1)));
 }
 
 TEST_F(UserInputTrackerTest, IgnoreRepeatEvents) {
   UserInputTracker tracker;
   FakeInputEvent e(blink::WebInputEvent::Char,
                    blink::WebInputEvent::IsAutoRepeat);
   tracker.OnInputEvent(e);
   EXPECT_EQ(base::TimeTicks(), tracker.FindMostRecentUserInputEventBefore(
                                    e.GetTimeStampRounded() +
                                    base::TimeDelta::FromMilliseconds(1)));
 }
 
 }  // namespace page_load_metrics