Add Startup.BrowserView.FirstPaint / .CompositingEnded histograms.

chrome/browser/metrics/first_web_contents_profiler.cc

Index: chrome/browser/metrics/first_web_contents_profiler.cc
diff --git a/chrome/browser/metrics/first_web_contents_profiler.cc b/chrome/browser/metrics/first_web_contents_profiler.cc
index 89cd3b2d543b8aee5f1d460a47a5ef696331436f..e67831b79e6fce602d4809f1f063e0ebf8c325ad 100644
--- a/chrome/browser/metrics/first_web_contents_profiler.cc
+++ b/chrome/browser/metrics/first_web_contents_profiler.cc
@@ -99,7 +99,7 @@ FirstWebContentsProfiler::FirstWebContentsProfiler(
 void FirstWebContentsProfiler::DidFirstVisuallyNonEmptyPaint() {
   if (collected_paint_metric_)
     return;
-  if (startup_metric_utils::WasNonBrowserUIDisplayed()) {
+  if (startup_metric_utils::WasMainWindowStartupInterrupted()) {
     FinishedCollectingMetrics(FinishReason::ABANDON_BLOCKING_UI);
     return;
   }
@@ -118,7 +118,7 @@ void FirstWebContentsProfiler::DidFirstVisuallyNonEmptyPaint() {
 void FirstWebContentsProfiler::DocumentOnLoadCompletedInMainFrame() {
   if (collected_load_metric_)
     return;
-  if (startup_metric_utils::WasNonBrowserUIDisplayed()) {
+  if (startup_metric_utils::WasMainWindowStartupInterrupted()) {
     FinishedCollectingMetrics(FinishReason::ABANDON_BLOCKING_UI);
     return;
   }
@@ -135,7 +135,7 @@ void FirstWebContentsProfiler::DidStartNavigation(
     content::NavigationHandle* navigation_handle) {
   if (collected_main_navigation_start_metric_)
     return;
-  if (startup_metric_utils::WasNonBrowserUIDisplayed()) {
+  if (startup_metric_utils::WasMainWindowStartupInterrupted()) {
     FinishedCollectingMetrics(FinishReason::ABANDON_BLOCKING_UI);
     return;
   }
@@ -172,7 +172,7 @@ void FirstWebContentsProfiler::DidFinishNavigation(
     return;
   }
 
-  if (startup_metric_utils::WasNonBrowserUIDisplayed()) {
+  if (startup_metric_utils::WasMainWindowStartupInterrupted()) {
     FinishedCollectingMetrics(FinishReason::ABANDON_BLOCKING_UI);
     return;
   }