Remove custom counts histogram from the blink API.

content/child/blink_platform_impl.h

 // 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.
 
 #ifndef CONTENT_CHILD_BLINK_PLATFORM_IMPL_H_
 #define CONTENT_CHILD_BLINK_PLATFORM_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 91 matching lines @@
   bool isReservedIPAddress(const blink::WebString& host) const override;
   bool portAllowed(const blink::WebURL& url) const override;
   blink::WebThread* createThread(const char* name) override;
   blink::WebThread* currentThread() override;
   void yieldCurrentThread() override;
   blink::WebWaitableEvent* createWaitableEvent(
       blink::WebWaitableEvent::ResetPolicy policy,
       blink::WebWaitableEvent::InitialState state) override;
   blink::WebWaitableEvent* waitMultipleEvents(
       const blink::WebVector<blink::WebWaitableEvent*>& events) override;
-  void histogramCustomCounts(const char* name,
-                             int sample,
-                             int min,
-                             int max,
-                             int bucket_count) override;
   void histogramEnumeration(const char* name,
                             int sample,
                             int boundary_value) override;
   void registerMemoryDumpProvider(blink::WebMemoryDumpProvider* wmdp,
                                   const char* name) override;
   void unregisterMemoryDumpProvider(
       blink::WebMemoryDumpProvider* wmdp) override;
   blink::WebProcessMemoryDump* createProcessMemoryDump() override;
   blink::Platform::WebMemoryAllocatorDumpGuid createWebMemoryAllocatorDumpGuid(
       const blink::WebString& guidStr) override;
@@ skipping 71 matching lines @@
   scoped_ptr<BackgroundSyncProvider> main_thread_sync_provider_;
 
   TrialTokenValidator trial_token_validator_;
 
   scheduler::WebThreadBase* compositor_thread_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_BLINK_PLATFORM_IMPL_H_