Revert of Explicitly ask for stack frame pointers on Debug posix builds.

build/config/compiler/BUILD.gn

Index: build/config/compiler/BUILD.gn
diff --git a/build/config/compiler/BUILD.gn b/build/config/compiler/BUILD.gn
index 7e65dfa41cf0301123c3af3e376133a59d6eb3fb..79723f6cc76c041697955f5c7de91e2935e78aa5 100644
--- a/build/config/compiler/BUILD.gn
+++ b/build/config/compiler/BUILD.gn
@@ -231,13 +231,10 @@
   # Non-Mac Posix compiler flags setup.
   # -----------------------------------
   if (is_posix && !(is_mac || is_ios)) {
-    if (enable_profiling || is_debug) {
-      # Explicitly ask for frame pointers, otherwise they are omitted when
-      # any optimization level is used (Android debug builds use -Os.)
-      # This prevents stack frames from working when profiling, and can cause
-      # crashes when unwinding stack frames (crbug.com/636489).
+    if (enable_profiling) {
+      # Explicitly ask for frame pointers. Otherwise they are omitted when
+      # any optimization level is used (and Android debug builds use -Os).
       cflags += [ "-fno-omit-frame-pointer" ]
-
       if (!is_debug) {
         cflags += [ "-g" ]
 
@@ -1277,13 +1274,6 @@
       "-ffunction-sections",
     ]
 
-    if (is_debug) {
-      # Explicitly ask for frame pointers, otherwise they are omitted when
-      # any optimization level is used and can cause crashes when unwinding
-      # stack frames (crbug.com/636489).
-      common_optimize_on_cflags += [ "-fno-omit-frame-pointer" ]
-    }
-
     common_optimize_on_ldflags += [
       # Specifically tell the linker to perform optimizations.
       # See http://lwn.net/Articles/192624/ .