Fix tcmalloc arm clang build

base/allocator/BUILD.gn

Index: base/allocator/BUILD.gn
diff --git a/base/allocator/BUILD.gn b/base/allocator/BUILD.gn
index cffe6c28db26e8aabc191ad85b9e94a9f1f783e9..9f8eca5e1e391b49dcef467d5859894fda03b6f3 100644
--- a/base/allocator/BUILD.gn
+++ b/base/allocator/BUILD.gn
@@ -73,6 +73,11 @@ config("tcmalloc_flags") {
       # typedefs.
       "-Wno-unused-private-field",
     ]
+    if (target_cpu == "arm") {
+      # Temporarily disable clang's integrated assembler when building tcmalloc
+      # TODO(https://llvm.org/bugs/show_bug.cgi?id=31058)
+      cflags += [ "-fno-integrated-as" ]

[llozano, 2016/11/22 19:42:53]

I thought the option is -no-integrated-as but this also works for some reason.
I think it is better to just use -no-integrated-as. That is how I find it in the
documentation...

+    }
   } else {
     cflags = []
   }
@@ -216,13 +221,7 @@ if (use_allocator == "tcmalloc") {
       "$tcmalloc_dir/src",
     ]
 
-    configs -= [
-      "//build/config/compiler:chromium_code",
-
-      # Thumb mode disabled due to bug in clang integrated assembler
-      # TODO(https://llvm.org/bugs/show_bug.cgi?id=31058)
-      "//build/config/compiler:compiler_arm_thumb",
-    ]
+    configs -= [ "//build/config/compiler:chromium_code" ]
     configs += [
       "//build/config/compiler:no_chromium_code",
       ":tcmalloc_flags",