[Android] Fix v8_use_external_startup_data = false.

android_webview/lib/main/aw_main_delegate.cc

Index: android_webview/lib/main/aw_main_delegate.cc
diff --git a/android_webview/lib/main/aw_main_delegate.cc b/android_webview/lib/main/aw_main_delegate.cc
index 053a91e6ce1c5f6be96225a40eb11ba9e72b7495..43508ba138409e0f8b1eb68cbc43a6c1b1586858 100644
--- a/android_webview/lib/main/aw_main_delegate.cc
+++ b/android_webview/lib/main/aw_main_delegate.cc
@@ -117,6 +117,7 @@ bool AwMainDelegate::BasicStartupComplete(int* exit_code) {
   // https://crbug.com/521319
   cl->AppendSwitch(switches::kDisablePresentationAPI);
 
+#if defined(V8_USE_EXTERNAL_STARTUP_DATA)
   if (cl->GetSwitchValueASCII(switches::kProcessType).empty()) {
     // Browser process (no type specified).
 
@@ -130,6 +131,7 @@ bool AwMainDelegate::BasicStartupComplete(int* exit_code) {
         kV8SnapshotDataDescriptor64,
         gin::V8Initializer::GetSnapshotFilePath(false).AsUTF8Unsafe());
   }
+#endif  // V8_USE_EXTERNAL_STARTUP_DATA
 
   if (cl->HasSwitch(switches::kWebViewSandboxedRenderer)) {
     cl->AppendSwitch(switches::kInProcessGPU);