Cleanup blink-side PlzNavigate logic

third_party/WebKit/Source/core/loader/ProgressTracker.cpp

Index: third_party/WebKit/Source/core/loader/ProgressTracker.cpp
diff --git a/third_party/WebKit/Source/core/loader/ProgressTracker.cpp b/third_party/WebKit/Source/core/loader/ProgressTracker.cpp
index da1c90211dddebd08e6b36bf5d7bc70327260dd6..b0a08e8014c2e212196ee10ddd0a9ded833fe36a 100644
--- a/third_party/WebKit/Source/core/loader/ProgressTracker.cpp
+++ b/third_party/WebKit/Source/core/loader/ProgressTracker.cpp
@@ -104,11 +104,12 @@ LocalFrameClient* ProgressTracker::localFrameClient() const {
 }
 
 void ProgressTracker::progressStarted(FrameLoadType type) {
-  if (!m_frame->isLoading())
-    localFrameClient()->didStartLoading(NavigationToDifferentDocument);
   reset();
   m_progressValue = initialProgressValue;
-  m_frame->setIsLoading(true);
+  if (!m_frame->isLoading()) {
+    localFrameClient()->didStartLoading(NavigationToDifferentDocument);
+    m_frame->setIsLoading(true);
+  }
   probe::frameStartedLoading(m_frame, type);
 }