Remove Sparse Histograms from Blink Platform API.

content/child/blink_platform_impl.cc

 // Copyright 2014 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/child/blink_platform_impl.h"
 
 #include <math.h>
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
 #include "base/location.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/singleton.h"
 #include "base/metrics/histogram.h"
-#include "base/metrics/sparse_histogram.h"
 #include "base/rand_util.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/synchronization/lock.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/sys_info.h"
 #include "base/thread_task_runner_handle.h"
 #include "base/threading/platform_thread.h"
@@ skipping 572 matching lines @@
     const char* name, int sample, int boundary_value) {
   // Copied from histogram macro, but without the static variable caching
   // the histogram because name is dynamic.
   base::HistogramBase* counter =
       base::LinearHistogram::FactoryGet(name, 1, boundary_value,
           boundary_value + 1, base::HistogramBase::kUmaTargetedHistogramFlag);
   DCHECK_EQ(name, counter->histogram_name());
   counter->Add(sample);
 }
 
-void BlinkPlatformImpl::histogramSparse(const char* name, int sample) {
-  // For sparse histograms, we can use the macro, as it does not incorporate a
-  // static.
-  UMA_HISTOGRAM_SPARSE_SLOWLY(name, sample);
-}
-
 void BlinkPlatformImpl::registerMemoryDumpProvider(
     blink::WebMemoryDumpProvider* wmdp, const char* name) {
   WebMemoryDumpProviderAdapter* wmdp_adapter =
       new WebMemoryDumpProviderAdapter(wmdp);
   bool did_insert =
       memory_dump_providers_.add(wmdp, make_scoped_ptr(wmdp_adapter)).second;
   if (!did_insert)
     return;
   wmdp_adapter->set_is_registered(true);
   base::trace_event::MemoryDumpManager::GetInstance()->RegisterDumpProvider(
@@ skipping 584 matching lines @@
   return WebString::fromUTF8(ui::KeycodeConverter::DomKeyToKeyString(
       static_cast<ui::DomKey>(dom_key)));
 }
 
 int BlinkPlatformImpl::domKeyEnumFromString(const WebString& key_string) {
   return static_cast<int>(
       ui::KeycodeConverter::KeyStringToDomKey(key_string.utf8()));
 }
 
 }  // namespace content