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 e54714344ace0ab61b1c7b3841c4c5e9392ad44c..306c0d01acf19f3d54daf7518afa73c2bc858ad5 100644
--- a/third_party/WebKit/Source/core/loader/ProgressTracker.cpp
+++ b/third_party/WebKit/Source/core/loader/ProgressTracker.cpp
@@ -104,12 +104,13 @@ LocalFrameClient* ProgressTracker::localFrameClient() const {
 }
 
 void ProgressTracker::progressStarted(FrameLoadType type) {
-  if (!m_frame->isLoading())
-    localFrameClient()->didStartLoading(NavigationToDifferentDocument);
   reset();
   m_progressValue = initialProgressValue;
-  m_frame->setIsLoading(true);
-  InspectorInstrumentation::frameStartedLoading(m_frame, type);
+  if (!m_frame->isLoading()) {
+    localFrameClient()->didStartLoading(NavigationToDifferentDocument);
+    m_frame->setIsLoading(true);
+    InspectorInstrumentation::frameStartedLoading(m_frame, type);
+  }
 }
 
 void ProgressTracker::progressCompleted() {