cc: Make --jank-instead-of-checkerboard jank more often

cc/scheduler_state_machine.cc

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 
 #include "cc/scheduler_state_machine.h"
 
 #include "base/logging.h"
 #include "base/stringprintf.h"
+#include "cc/settings.h"
 
 namespace cc {
 
 SchedulerStateMachine::SchedulerStateMachine()
     : m_commitState(COMMIT_STATE_IDLE)
     , m_currentFrameNumber(0)
     , m_lastFrameNumberWhereDrawWasCalled(-1)
     , m_consecutiveFailedDraws(0)
     , m_maximumNumberOfFailedDrawsBeforeDrawIsForced(3)
     , m_needsRedraw(false)
@@ skipping 235 matching lines @@
     m_needsForcedRedraw = true;
 }
 
 void SchedulerStateMachine::didDrawIfPossibleCompleted(bool success)
 {
     m_drawIfPossibleFailed = !success;
     if (m_drawIfPossibleFailed) {
         m_needsRedraw = true;
         m_needsCommit = true;
         m_consecutiveFailedDraws++;
-        if (m_consecutiveFailedDraws >= m_maximumNumberOfFailedDrawsBeforeDrawIsForced) {
+        if (!Settings::jankInsteadOfCheckerboard() && m_consecutiveFailedDraws >= m_maximumNumberOfFailedDrawsBeforeDrawIsForced) {
             m_consecutiveFailedDraws = 0;
             // We need to force a draw, but it doesn't make sense to do this until
             // we've committed and have new textures.
             m_needsForcedRedrawAfterNextCommit = true;
         }
     } else
       m_consecutiveFailedDraws = 0;
 }
 
 void SchedulerStateMachine::setNeedsCommit()
@@ skipping 32 matching lines @@
     m_contextState = CONTEXT_ACTIVE;
     setNeedsCommit();
 }
 
 void SchedulerStateMachine::setMaximumNumberOfFailedDrawsBeforeDrawIsForced(int numDraws)
 {
     m_maximumNumberOfFailedDrawsBeforeDrawIsForced = numDraws;
 }
 
 }