ui: Make dalvik_limit static so that its value is cached across calls

ui/gl/gl_context_android.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 "ui/gl/gl_context.h"
 
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/sys_info.h"
 #include "ui/gl/gl_bindings.h"
@@ skipping 78 matching lines @@
   // end devices, 1/2 of the heap size can be too high, but this
   // correlates well with having a small heap-growth-limit. So for
   // devices with less ram, we factor in the growth limit.
   //
   // This is the result of the calculation below:
   // Droid DNA 1080P  128MB
   // Nexus S           56MB
   // Galaxy Nexus     112MB
   // Nexus 4/10       256MB
   // Xoom              88MB
-  size_t dalvik_limit = 0;
+  static size_t dalvik_limit = 0;
   if (!dalvik_limit) {
     size_t heap_size   = static_cast<size_t>(base::SysInfo::DalvikHeapSizeMB());
     size_t heap_growth = static_cast<size_t>(
                              base::SysInfo::DalvikHeapGrowthLimitMB());
     size_t limit = 0;
     if (heap_size >= 350)
         limit = heap_size / 2;
     else
         limit = (heap_size + (heap_growth * 2)) / 4;
     dalvik_limit = limit * 1024 * 1024;
   }
   *bytes = dalvik_limit;
   return true;
 }
 
 }