Restrict memory maps dump provider to only android and linux

base/trace_event/BUILD.gn

Index: base/trace_event/BUILD.gn
diff --git a/base/trace_event/BUILD.gn b/base/trace_event/BUILD.gn
index a55c55d75ce9f722bd9b268b7b224a8c51c10709..ad9344265bdcfee2beb55c627c708d31ebab47fc 100644
--- a/base/trace_event/BUILD.gn
+++ b/base/trace_event/BUILD.gn
@@ -23,7 +23,6 @@ source_set("trace_event") {
     "process_memory_dump.h",
     "process_memory_maps.cc",
     "process_memory_maps.h",
-    "process_memory_maps_dump_provider.cc",
     "process_memory_maps_dump_provider.h",
     "process_memory_totals.cc",
     "process_memory_totals.h",
@@ -72,6 +71,7 @@ source_set("trace_event") {
     sources += [
       "malloc_dump_provider.cc",
       "malloc_dump_provider.h",
+      "process_memory_maps_dump_provider.cc",
     ]
   }
 
@@ -106,7 +106,6 @@ source_set("trace_event_unittests") {
     "memory_dump_manager_unittest.cc",
     "memory_profiler_allocation_context_unittest.cc",
     "process_memory_dump_unittest.cc",
-    "process_memory_maps_dump_provider_unittest.cc",
     "process_memory_totals_dump_provider_unittest.cc",
     "trace_config_memory_test_util.h",
     "trace_config_unittest.cc",
@@ -119,6 +118,10 @@ source_set("trace_event_unittests") {
     "winheap_dump_provider_win_unittest.cc",
   ]
 
+  if (is_linux || is_android) {
+    sources += [ "process_memory_maps_dump_provider_unittest.cc" ]
+  }
+
   deps = [
     "//base/test:test_support",
     "//testing/gmock",