Revert "[Compiler] Use CompilationCache for StreamedScript compilation."

This reverts commit eac4b59f.

Reason for revert:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/builds/21829

See:
https://github.com/v8/v8/wiki/Blink-layout-tests

Original change's description:
> [Compiler] Use CompilationCache for StreamedScript compilation.
> 
> Previously GetSharedFunctionInfoForStreamedScript didn't either check the
> compilation cache or put the result of compilation into the compilation
> cache. This would mean future compiles would need to re-parse / compile
> the same script even if the isolate had already seen it. This CL
> fixes this.
> 
> BUG=v8:5203
> 
> Change-Id: I421627b80848feb9884e2440c4ee66556e05b3c9
> Reviewed-on: https://chromium-review.googlesource.com/924285
> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
> Reviewed-by: Mythri Alle <mythria@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#51469}

TBR=rmcilroy@chromium.org,mythria@chromium.org

Change-Id: Id822b55bd162b74f098160a11e6a3bda6924c1e4
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:5203
Reviewed-on: https://chromium-review.googlesource.com/931821Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51477}

src/compiler.cc

@@ -1755,62 +1755,42 @@ Compiler::GetSharedFunctionInfoForStreamedScript(
   ParseInfo* parse_info = streaming_data->info.get();
   parse_info->UpdateBackgroundParseStatisticsOnMainThread(isolate);
 
-  // Check if compile cache already holds the SFI, if so no need to finalize
-  // the code compiled on the background thread.
-  CompilationCache* compilation_cache = isolate->compilation_cache();
-  MaybeHandle<SharedFunctionInfo> maybe_result =
-      compilation_cache->LookupScript(
-          source, script_details.name_obj, script_details.line_offset,
-          script_details.column_offset, origin_options,
-          isolate->native_context(), parse_info->language_mode());
-  if (!maybe_result.is_null()) {
-    compile_timer.set_hit_isolate_cache();
+  Handle<Script> script = NewScript(isolate, source, script_details,
+                                    origin_options, NOT_NATIVES_CODE);
+  parse_info->set_script(script);
+  streaming_data->parser->UpdateStatistics(isolate, script);
+  streaming_data->parser->HandleSourceURLComments(isolate, script);
+
+  if (parse_info->literal() == nullptr) {
+    // Parsing has failed - report error messages.
+    parse_info->pending_error_handler()->ReportErrors(
+        isolate, script, parse_info->ast_value_factory());
+    streaming_data->Release();
+    return MaybeHandle<SharedFunctionInfo>();
   }
 
-  if (maybe_result.is_null()) {
-    // No cache entry found, finalize compilation of the script and add it to
-    // the isolate cache.
-    Handle<Script> script = NewScript(isolate, source, script_details,
-                                      origin_options, NOT_NATIVES_CODE);
-    parse_info->set_script(script);
-    streaming_data->parser->UpdateStatistics(isolate, script);
-    streaming_data->parser->HandleSourceURLComments(isolate, script);
-
-    if (parse_info->literal() == nullptr) {
-      // Parsing has failed - report error messages.
-      parse_info->pending_error_handler()->ReportErrors(
-          isolate, script, parse_info->ast_value_factory());
-      streaming_data->Release();
-      return MaybeHandle<SharedFunctionInfo>();
-    }
-
-    // Parsing has succeeded - finalize compilation.
-    if (i::FLAG_background_compile) {
-      // Finalize background compilation.
-      if (streaming_data->outer_function_job) {
-        maybe_result = FinalizeTopLevel(
-            parse_info, isolate, streaming_data->outer_function_job.get(),
-            &streaming_data->inner_function_jobs);
-      } else {
-        // Compilation failed on background thread - throw an exception.
-        if (!isolate->has_pending_exception()) isolate->StackOverflow();
-      }
+  // Parsing has succeeded - finalize compilation.
+  MaybeHandle<SharedFunctionInfo> result;
+  if (i::FLAG_background_compile) {
+    // Finalize background compilation.
+    if (streaming_data->outer_function_job) {
+      result = FinalizeTopLevel(parse_info, isolate,
+                                streaming_data->outer_function_job.get(),
+                                &streaming_data->inner_function_jobs);
     } else {
-      // Compilation on main thread.
-      maybe_result = CompileToplevel(parse_info, isolate);
-    }
-
-    // Add compiled code to the isolate cache.
-    Handle<SharedFunctionInfo> result;
-    if (!maybe_result.ToHandle(&result)) {
-      isolate->debug()->OnAfterCompile(script);
-      compilation_cache->PutScript(source, isolate->native_context(),
-                                   parse_info->language_mode(), result);
+      // Compilation failed on background thread - throw an exception.
+      if (!isolate->has_pending_exception()) isolate->StackOverflow();
     }
+  } else {
+    // Compilation on main thread.
+    result = CompileToplevel(parse_info, isolate);
   }
 
+  if (!result.is_null()) {
+    isolate->debug()->OnAfterCompile(script);
+  }
   streaming_data->Release();
-  return maybe_result;
+  return result;
 }
 
 Handle<SharedFunctionInfo> Compiler::GetSharedFunctionInfo(