Remove Enumeration Histograms from the Blink Platform API.

third_party/WebKit/Source/platform/text/CompressibleString.cpp

 // 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 "platform/text/CompressibleString.h"
 
-#include "public/platform/Platform.h"
+#include "platform/Histogram.h"
 #include "wtf/Assertions.h"
 #include "wtf/WTFThreadData.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class CompressibleStringTable {
     WTF_MAKE_NONCOPYABLE(CompressibleStringTable);
 public:
     static CompressibleStringTable* create(WTFThreadData& data)
@@ skipping 72 matching lines @@
 }
 
 enum CompressibleStringCountType {
     StringWasCompressedInBackgroundTab,
     StringWasDecompressed,
     CompressibleStringCountTypeMax = StringWasDecompressed,
 };
 
 static void recordCompressibleStringCount(CompressibleStringCountType type)
 {
-    Platform::current()->histogramEnumeration("Memory.CompressibleStringCount", type, CompressibleStringCountTypeMax + 1);
+    DEFINE_THREAD_SAFE_STATIC_LOCAL(EnumerationHistogram, sringTypeHistogram, new EnumerationHistogram("Memory.CompressibleStringCount", CompressibleStringCountTypeMax + 1));
+    sringTypeHistogram.count(type);
 }
 
 // compressString does nothing but collect UMA so far.
 // TODO(hajimehoshi): Implement this.
 void CompressibleStringImpl::compressString()
 {
     recordCompressibleStringCount(StringWasCompressedInBackgroundTab);
     ASSERT(!isCompressed());
     m_isCompressed = true;
 }
 
 // decompressString does nothing but collect UMA so far.
 // TODO(hajimehoshi): Implement this.
 void CompressibleStringImpl::decompressString()
 {
     // TODO(hajimehoshi): We wanted to tell whether decompressing in a
     // background tab or a foreground tab, but this was impossible. For example,
     // one renderer process of a new tab page is used for multiple tabs.
     // Another example is that reloading a page will re-use the process with a
     // new Page object and updating a static variable along with reloading will
     // be complex. See also crbug/581266. We will revisit when the situation
     // changes.
     recordCompressibleStringCount(StringWasDecompressed);
     ASSERT(isCompressed());
     m_isCompressed = false;
 }
 
 } // namespace blink