SQLite: harden the condition for enabling asserts (&& use_sanitizer_coverage).

TBR=pwnall@chromium.org

Bug: 906634
Change-Id: I0d457be636e330a06915bff1750da03d90746d16
Reviewed-on: https://chromium-review.googlesource.com/c/1341921Reviewed-by: Max Moroz <mmoroz@chromium.org>
Commit-Queue: Max Moroz <mmoroz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#609337}

third_party/sqlite/BUILD.gn

@@ -3,6 +3,7 @@
 # found in the LICENSE file.
 
 import("//build/config/dcheck_always_on.gni")
+import("//build/config/sanitizers/sanitizers.gni")
 import("//testing/libfuzzer/fuzzer_test.gni")
 
 # Compile-time options passed to SQLite.
@@ -188,7 +189,8 @@ config("chromium_sqlite3_compile_options") {
     }
   }
 
-  if (use_fuzzing_engine && (is_debug || dcheck_always_on)) {
+  if (use_fuzzing_engine && use_sanitizer_coverage &&
+      (is_debug || dcheck_always_on)) {
     # Enable SQLite's assert() macros.
     defines += [ "SQLITE_DEBUG" ]
 
@@ -208,10 +210,11 @@ config("sqlite_warnings") {
     # sqlite3Fts3InitTok).
     cflags += [ "-Wno-unused-function" ]
 
-    if (use_fuzzing_engine && (is_debug || dcheck_always_on)) {
+    if (use_fuzzing_engine && use_sanitizer_coverage &&
+        (is_debug || dcheck_always_on)) {
       cflags += [
         "-Wno-implicit-function-declaration",
-        "-Wno-string-conversion"
+        "-Wno-string-conversion",
       ]
     }
   }
@@ -376,9 +379,7 @@ if (is_linux) {
 }
 
 fuzzer_test("sqlite3_ossfuzz_fuzzer") {
-  include_dirs = [
-    ".",
-  ]
+  include_dirs = [ "." ]
   sources = [
     "src/test/ossfuzz.c",
   ]