Adjust memory sizes of persistent histogram allocations.

content/browser/browser_child_process_host_impl.cc

 // Copyright (c) 2012 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/browser/browser_child_process_host_impl.h"
 
 #include "base/base_switches.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/dump_without_crashing.h"
@@ skipping 462 matching lines @@
   // they're active in the browser.
   // TODO(bcwhite): Remove this once persistence is always enabled.
   if (!base::GlobalHistogramAllocator::Get())
     return;
 
   // Determine the correct parameters based on the process type.
   size_t memory_size;
   base::StringPiece metrics_name;
   switch (data_.process_type) {
     case PROCESS_TYPE_UTILITY:
-      memory_size = 100 << 10;  // 100 KiB
+      memory_size = 64 << 10;  // 64 KiB
       metrics_name = "UtilityMetrics";
       break;
 
     case PROCESS_TYPE_ZYGOTE:
-      memory_size = 100 << 10;  // 100 KiB
+      memory_size = 64 << 10;  // 64 KiB
       metrics_name = "ZygoteMetrics";
       break;
 
     case PROCESS_TYPE_SANDBOX_HELPER:
-      memory_size = 100 << 10;  // 100 KiB
+      memory_size = 64 << 10;  // 64 KiB
       metrics_name = "SandboxHelperMetrics";
       break;
 
     case PROCESS_TYPE_GPU:
-      memory_size = 100 << 10;  // 100 KiB
+      memory_size = 64 << 10;  // 64 KiB
       metrics_name = "GpuMetrics";
       break;
 
     case PROCESS_TYPE_PPAPI_PLUGIN:
-      memory_size = 100 << 10;  // 100 KiB
+      memory_size = 64 << 10;  // 64 KiB
       metrics_name = "PpapiPluginMetrics";
       break;
 
     case PROCESS_TYPE_PPAPI_BROKER:
-      memory_size = 100 << 10;  // 100 KiB
+      memory_size = 64 << 10;  // 64 KiB
       metrics_name = "PpapiBrokerMetrics";
       break;
 
     default:
       UMA_HISTOGRAM_ENUMERATION(
           "UMA.SubprocessMetricsProvider.UntrackedProcesses",
           data_.process_type, PROCESS_TYPE_CONTENT_END);
       return;
   }
 
@@ skipping 86 matching lines @@
 
 #if defined(OS_WIN)
 
 void BrowserChildProcessHostImpl::OnObjectSignaled(HANDLE object) {
   OnChildDisconnected();
 }
 
 #endif
 
 }  // namespace content