Subdivide compile time for asm/wasm functions.

Collect compile time separately form asm.js and Wasm functions.

Depends on CL https://chromium-review.googlesource.com/c/598930

Bug: chrome:709684
Change-Id: Ic0ccb42445c8f98ce7175da5ac44d6f958114558
Reviewed-on: https://chromium-review.googlesource.com/598542Reviewed-by: Bill Budge <bbudge@chromium.org>
Reviewed-by: Steven Holte <holte@chromium.org>
Commit-Queue: Karl Schimpf <kschimpf@chromium.org>
Cr-Commit-Position: refs/heads/master@{#491815}

tools/metrics/histograms/histograms.xml

@@ -99874,6 +99874,7 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 <histogram_suffixes name="V8WasmSeparateAsmAndWasm" separator=".">
   <suffix name="asm" label="This histogram contains results for asm.js"/>
   <suffix name="wasm" label="This histogram contains results for WASM modules"/>
+  <affected-histogram name="V8.WasmCompileFunctionMicroSeconds"/>
   <affected-histogram name="V8.WasmCompileModuleMicroSeconds"/>
   <affected-histogram name="V8.WasmDecodeFunctionMicroSeconds"/>
   <affected-histogram name="V8.WasmDecodeModuleMicroSeconds"/>