Add test to track the number of hit tests on various events

Source/core/rendering/RenderView.cpp

Index: Source/core/rendering/RenderView.cpp
diff --git a/Source/core/rendering/RenderView.cpp b/Source/core/rendering/RenderView.cpp
index 5002d370fdcecf565f1151986941fa3225aa1c18..9fe7c72970a18f46ba13ec8d992f9783e78947c5 100644
--- a/Source/core/rendering/RenderView.cpp
+++ b/Source/core/rendering/RenderView.cpp
@@ -60,6 +60,7 @@ RenderView::RenderView(Document* document)
     , m_layoutState(0)
     , m_renderQuoteHead(0)
     , m_renderCounterCount(0)
+    , m_hitTestCount(0)
 {
     // init RenderObject attributes
     setInline(false);
@@ -84,6 +85,7 @@ bool RenderView::hitTest(const HitTestRequest& request, HitTestResult& result)
 bool RenderView::hitTest(const HitTestRequest& request, const HitTestLocation& location, HitTestResult& result)
 {
     TRACE_EVENT0("blink", "RenderView::hitTest");
+    m_hitTestCount++;
 
     // We have to recursively update layout/style here because otherwise, when the hit test recurses
     // into a child document, it could trigger a layout on the parent document, which can destroy RenderLayers
@@ -94,6 +96,13 @@ bool RenderView::hitTest(const HitTestRequest& request, const HitTestLocation& l
     return layer()->hitTest(request, location, result);
 }
 
+unsigned RenderView::hitTestCountDelta()

[esprehn, 2014/06/26 02:33:50]

This should just be a const inline getter, remove the reset to 0.

Add a separate method if you want to reset it. This doesn't really return a
delta anyway.

[Rick Byers, 2014/06/26 15:35:18]

Done.

+{
+    unsigned count = m_hitTestCount;
+    m_hitTestCount = 0;
+    return count;
+}
+
 void RenderView::computeLogicalHeight(LayoutUnit logicalHeight, LayoutUnit, LogicalExtentComputedValues& computedValues) const
 {
     computedValues.m_extent = (!shouldUsePrintingLayout() && m_frameView) ? LayoutUnit(viewLogicalHeight()) : logicalHeight;