Split memory-related routines out of base/process_util.h into base/process/memory.h.

base/base.gyp

Index: base/base.gyp
diff --git a/base/base.gyp b/base/base.gyp
index 85c97518d4e5d640338802f3de8348ccf53b7dbd..d7758f8d124500fa0f6fbb1c6a59a8eaecf31cc1 100644
--- a/base/base.gyp
+++ b/base/base.gyp
@@ -563,8 +563,9 @@
         'prefs/pref_value_store_unittest.cc',
         'process_util_unittest.cc',
         'process_util_unittest_ios.cc',
-        'process_util_unittest_mac.h',
-        'process_util_unittest_mac.mm',
+        'process/memory_unittest.cc',
+        'process/memory_unittest_mac.h',
+        'process/memory_unittest_mac.mm',
         'profiler/tracked_time_unittest.cc',
         'rand_util_unittest.cc',
         'safe_numerics_unittest.cc',
@@ -685,7 +686,8 @@
         ['OS == "ios" and _toolset != "host"', {
           'sources/': [
             # Only test the iOS-meaningful portion of process_utils.
-            ['exclude', '^process_util_unittest'],
+            ['exclude', '^process_util_unittest\\.cc$'],
+            ['exclude', '^process/memory_unittest'],
             ['include', '^process_util_unittest_ios\\.cc$'],
             # Requires spawning processes.
             ['exclude', '^metrics/stats_table_unittest\\.cc$'],