Move speculations pump scheduling logic to HTMLParserScheduler.

Source/core/html/parser/HTMLParserScheduler.cpp

Index: Source/core/html/parser/HTMLParserScheduler.cpp
diff --git a/Source/core/html/parser/HTMLParserScheduler.cpp b/Source/core/html/parser/HTMLParserScheduler.cpp
index b234f684a237e3898d85e1e5fac40d770bea4795..31ab010bc14a7a15d2abbde520216a20bd5f4393 100644
--- a/Source/core/html/parser/HTMLParserScheduler.cpp
+++ b/Source/core/html/parser/HTMLParserScheduler.cpp
@@ -29,6 +29,8 @@
 #include "core/dom/Document.h"
 #include "core/html/parser/HTMLDocumentParser.h"
 #include "core/frame/FrameView.h"
+#include "platform/scheduler/Scheduler.h"
+#include "wtf/CurrentTime.h"
 
 namespace blink {
 
@@ -57,6 +59,21 @@ PumpSession::~PumpSession()
 {
 }
 
+SpeculationsPumpSession::SpeculationsPumpSession(Document* document)
+    : ActiveParserSession(document)
+    , m_startTime(currentTime())
+{
+}
+
+SpeculationsPumpSession::~SpeculationsPumpSession()
+{
+}
+
+inline double SpeculationsPumpSession::elapsedTime() const
+{
+    return currentTime() - m_startTime;
+}
+
 HTMLParserScheduler::HTMLParserScheduler(HTMLDocumentParser* parser)
     : m_parser(parser)
     , m_continueNextChunkTimer(this, &HTMLParserScheduler::continueNextChunkTimerFired)
@@ -98,4 +115,26 @@ void HTMLParserScheduler::resume()
     m_continueNextChunkTimer.startOneShot(0, FROM_HERE);
 }
 
+inline bool HTMLParserScheduler::shouldYield(const SpeculationsPumpSession& session)
+{
+    if (Scheduler::shared()->shouldYieldForHighPriorityWork())
+        return true;
+
+    const double parserTimeLimit = 0.500;

[Sami, 2014/10/16 12:46:25]

nit: no need for the trailing zeros.

[kouhei (in TOK), 2014/10/16 12:54:19]

Done.

+    if (session.elapsedTime() > parserTimeLimit)
+        return true;
+
+    return false;
+}
+
+bool HTMLParserScheduler::yieldIfNeeded(const SpeculationsPumpSession& session)
+{
+    if (shouldYield(session)) {
+        scheduleForResume();
+        return true;
+    }
+
+    return false;
+}
+
 }