Disable partition allocation on iOS.

base/BUILD.gn

Index: base/BUILD.gn
diff --git a/base/BUILD.gn b/base/BUILD.gn
index 244aec489aee05c4ff3fb83d2958f07f8e08da1b..0c4b35fa4cec2faca98dc4d73e87fe9f4fbd18b4 100644
--- a/base/BUILD.gn
+++ b/base/BUILD.gn
@@ -1235,16 +1235,18 @@ component("base") {
       "synchronization/read_write_lock_nacl.cc",
     ]
 
-    # Add stuff that doesn't work in NaCl.
-    sources += [
-      # PartitionAlloc uses SpinLock, which doesn't work in NaCl (see below).
-      "allocator/partition_allocator/address_space_randomization.cc",
-      "allocator/partition_allocator/address_space_randomization.h",
-      "allocator/partition_allocator/page_allocator.cc",
-      "allocator/partition_allocator/page_allocator.h",
-      "allocator/partition_allocator/partition_alloc.cc",
-      "allocator/partition_allocator/partition_alloc.h",
-    ]
+    if (!is_ios) {
+      # Add stuff that doesn't work in NaCl.
+      sources += [
+        # PartitionAlloc uses SpinLock, which doesn't work in NaCl (see below).
+        "allocator/partition_allocator/address_space_randomization.cc",
+        "allocator/partition_allocator/address_space_randomization.h",
+        "allocator/partition_allocator/page_allocator.cc",
+        "allocator/partition_allocator/page_allocator.h",
+        "allocator/partition_allocator/partition_alloc.cc",
+        "allocator/partition_allocator/partition_alloc.h",
+      ]
+    }
   }
 
   # SpinLock uses inline assembly that doesn't work on NaCl, and for which there
@@ -1807,7 +1809,6 @@ if (is_ios || is_mac) {
 
 test("base_unittests") {
   sources = [
-    "allocator/partition_allocator/partition_alloc_unittest.cc",
     "allocator/tcmalloc_unittest.cc",
     "android/application_status_listener_unittest.cc",
     "android/content_uri_utils_unittest.cc",
@@ -2171,6 +2172,8 @@ test("base_unittests") {
     set_sources_assignment_filter(sources_assignment_filter)
 
     # TODO(GYP): dep on copy_test_data_ios action.
+  } else {
+    sources += [ "allocator/partition_allocator/partition_alloc_unittest.cc" ]
   }
 
   if (is_mac) {