Rewrite references to "wtf/" to "platform/wtf/" in the rest of platform/.

third_party/WebKit/Source/platform/Histogram.h

 // 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.
 
 #ifndef Histogram_h
 #define Histogram_h
 
+#include <stdint.h>
 #include "base/metrics/histogram_base.h"
 #include "base/metrics/histogram_macros.h"
 #include "platform/PlatformExport.h"
-#include "wtf/CurrentTime.h"
-#include <stdint.h>
+#include "platform/wtf/CurrentTime.h"
 
 namespace base {
 class HistogramBase;
 };
 
 namespace blink {
 
 class PLATFORM_EXPORT CustomCountHistogram {
  public:
   // Min values should be >=1 as emitted 0s still go into the underflow bucket.
@@ skipping 57 matching lines @@
 // This macro records all times between 0us and 10 seconds.
 // Do not change this macro without renaming all metrics that use it!
 #define SCOPED_BLINK_UMA_HISTOGRAM_TIMER(name)                 \
   DEFINE_STATIC_LOCAL(CustomCountHistogram, scoped_us_counter, \
                       (name, 0, 10000000, 50));                \
   ScopedUsHistogramTimer timer(scoped_us_counter);
 
 }  // namespace blink
 
 #endif  // Histogram_h