Remove unused flag BackgroundHTMLParser::should_coalesce_chunks_

This CL removes unused flag BackgroundHTMLParser::should_coalesce_chunks_.
The flag is always false and never true.

Bug: None
Change-Id: I46fbb259dfe9cf7b814935037c026d2db9e33beb
Reviewed-on: https://chromium-review.googlesource.com/1026332Reviewed-by: Kent Tamura <tkent@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Kouhei Ueno <kouhei@chromium.org>
Cr-Commit-Position: refs/heads/master@{#553445}

third_party/blink/renderer/core/html/parser/background_html_parser.cc

@@ -108,8 +108,7 @@ void BackgroundHTMLParser::Init(
 
 BackgroundHTMLParser::Configuration::Configuration()
     : outstanding_token_limit(kDefaultOutstandingTokenLimit),
-      pending_token_limit(kDefaultPendingTokenLimit),
-      should_coalesce_chunks(false) {}
+      pending_token_limit(kDefaultPendingTokenLimit) {}
 
 BackgroundHTMLParser::BackgroundHTMLParser(
     std::unique_ptr<Configuration> config,
@@ -129,8 +128,7 @@ BackgroundHTMLParser::BackgroundHTMLParser(
       tokenized_chunk_queue_(std::move(config->tokenized_chunk_queue)),
       pending_csp_meta_token_index_(
           HTMLDocumentParser::TokenizedChunk::kNoPendingToken),
-      starting_script_(false),
-      should_coalesce_chunks_(config->should_coalesce_chunks) {
+      starting_script_(false) {
   DCHECK_GT(outstanding_token_limit_, 0u);
   DCHECK_GT(pending_token_limit_, 0u);
   DCHECK_GE(outstanding_token_limit_, pending_token_limit_);
@@ -292,7 +290,7 @@ void BackgroundHTMLParser::PumpTokenizer() {
         break;
     }
 
-    if (!should_coalesce_chunks_ && should_notify_main_thread) {
+    if (should_notify_main_thread) {
       RunOnMainThread(&HTMLDocumentParser::NotifyPendingTokenizedChunks,
                       parser_);
       should_notify_main_thread = false;

third_party/blink/renderer/core/html/parser/background_html_parser.h

@@ -65,7 +65,6 @@ class BackgroundHTMLParser {
     // pendingTokenLimit
     size_t outstanding_token_limit;
     size_t pending_token_limit;
-    bool should_coalesce_chunks;
   };
 
   // The returned BackgroundHTMLParser should only be used on the parser
@@ -147,7 +146,6 @@ class BackgroundHTMLParser {
   int pending_csp_meta_token_index_;
 
   bool starting_script_;
-  bool should_coalesce_chunks_;
 
   DISALLOW_COPY_AND_ASSIGN(BackgroundHTMLParser);
 };