DevTools: Highlight DOM node on hover in flamechart.

third_party/WebKit/LayoutTests/inspector/components/flame-chart.html

Index: third_party/WebKit/LayoutTests/inspector/components/flame-chart.html
diff --git a/third_party/WebKit/LayoutTests/inspector/components/flame-chart.html b/third_party/WebKit/LayoutTests/inspector/components/flame-chart.html
index df5f86734c960e06ab74b8ec5fa64fec4e05075f..02c0efafe762bd7e12395ed268ddca2549ae07b9 100644
--- a/third_party/WebKit/LayoutTests/inspector/components/flame-chart.html
+++ b/third_party/WebKit/LayoutTests/inspector/components/flame-chart.html
@@ -63,6 +63,9 @@ InspectorTest.FlameChartProvider = class {
 
     decorateEntry(entryIndex, context, text, barX, barY, barWidth, barHeight, unclippedBarX, timeToPixels) {
     }
+
+    highlightEntry(entryIndex) {
+    }
 }
 
 }