[v8-browsing] Add WebAssembly UMA metrics to v8-browsing

This CL brings WebAssembly UMA metrics to the v8-browsing benchmark in
Telemetry.

R=mythria@chromium.org, clemensb@chromium.org

Bug: chromium:1084929
Change-Id: I28e72378774c3d599da1ad670ba036a3f0ea84e0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2497164Reviewed-by: Mythri Alle <mythria@chromium.org>
Reviewed-by: John Chen <johnchen@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#820779}

tools/perf/benchmarks/v8_browsing.py

@@ -11,6 +11,19 @@ from telemetry.timeline import chrome_trace_config
 from telemetry.web_perf import timeline_based_measurement
 import page_sets
 
+V8_BROWSING_BENCHMARK_UMA = [
+    'V8.WasmCompileModuleMicroSeconds.wasm',
+    'V8.WasmCompileModuleAsyncMicroSeconds',
+    'V8.WasmCompileModuleStreamingMicroSeconds',
+    'V8.WasmFinishModuleStreamingMicroSeconds',
+    'V8.WasmTierUpModuleMicroSeconds',
+    'V8.WasmCompileFunctionMicroSeconds.wasm',
+    'V8.WasmInstantiateModuleMicroSeconds.wasm',
+    'V8.WasmModuleCodeSizeTopTierMiB',
+    'V8.WasmCompileFunctionPeakMemoryBytes',
+    'V8.WasmModuleCodeSizeMiB',
+]
+
 
 def AugmentOptionsForV8BrowsingMetrics(options, enable_runtime_call_stats=True):
   categories = [
@@ -44,14 +57,18 @@ def AugmentOptionsForV8BrowsingMetrics(options, enable_runtime_call_stats=True):
 
   options.config.chrome_trace_config.SetTraceBufferSizeInKb(400 * 1024)
 
+  options.config.chrome_trace_config.EnableUMAHistograms(
+      *V8_BROWSING_BENCHMARK_UMA)
+
   metrics = [
-    'blinkGcMetric',
-    'consoleErrorMetric',
-    'expectedQueueingTimeMetric',
-    'gcMetric',
-    'memoryMetric',
-    'reportedByPageMetric',
-    'wasmMetric',
+      'blinkGcMetric',
+      'consoleErrorMetric',
+      'expectedQueueingTimeMetric',
+      'gcMetric',
+      'memoryMetric',
+      'reportedByPageMetric',
+      'umaMetric',
+      'wasmMetric',
   ]
   options.ExtendTimelineBasedMetric(metrics)
   if enable_runtime_call_stats: