Use DWARF 3 on android, instead of DWARF 4.

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 47a732b3b53e83aca5c8fa52428b605e7814fd5b..ad6cc65677497ad7fd377cb9b144d32eff52c791 100644
--- a/build/config/compiler/BUILD.gn
+++ b/build/config/compiler/BUILD.gn
@@ -1525,6 +1525,14 @@ config("symbols") {
         # dump_syms, so this is still required (https://crbug.com/622406).
         cflags += [ "-fno-standalone-debug" ]
       }
+    } else if (is_android) {
+      # Breakpad can't handle DWARF 4 symbols properly yet, so use DWARF 3
+      # explicitly on android where we are hitting https://crbug.com/638485.
+      # The arguments MUST be in this order because of a gcc arg parsing bug.
+      cflags = [
+        "-gdwarf-3",
+        "-g2",
+      ]
     } else {
       cflags = [ "-g2" ]
     }
@@ -1550,7 +1558,17 @@ config("minimal_symbols") {
       ldflags = [ "/DEBUG" ]
     }
   } else {
-    cflags = [ "-g1" ]
+    if (is_android) {
+      # Breakpad can't handle DWARF 4 symbols properly yet, so use DWARF 3
+      # explicitly on android where we are hitting https://crbug.com/638485.
+      # The arguments MUST be in this order because of a gcc arg parsing bug.
+      cflags = [
+        "-gdwarf-3",
+        "-g1",
+      ]
+    } else {
+      cflags = [ "-g1" ]
+    }
     if (use_debug_fission) {
       cflags += [ "-gsplit-dwarf" ]
     }