Add UMA to measure time to open hyphenation dictionary

content/browser/hyphenation/hyphenation_impl.cc

Index: content/browser/hyphenation/hyphenation_impl.cc
diff --git a/content/browser/hyphenation/hyphenation_impl.cc b/content/browser/hyphenation/hyphenation_impl.cc
index f22a896c3239be48799b0b90a169d0605f44d926..5e6c3cda728f8b5f5b9da758e2edb8ea1be91808 100644
--- a/content/browser/hyphenation/hyphenation_impl.cc
+++ b/content/browser/hyphenation/hyphenation_impl.cc
@@ -10,8 +10,10 @@
 
 #include "base/files/file.h"
 #include "base/files/file_path.h"
+#include "base/metrics/histogram.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
+#include "base/timer/elapsed_timer.h"
 #include "mojo/public/cpp/bindings/strong_binding.h"
 #include "mojo/public/cpp/system/platform_handle.h"
 
@@ -43,7 +45,9 @@ static base::File& GetDictionaryFile(const std::string& locale) {
 #endif
   std::string filename = base::StringPrintf("hyph-%s.hyb", locale.c_str());
   base::FilePath path = dir.AppendASCII(filename);
+  base::ElapsedTimer timer;
   file.Initialize(path, base::File::FLAG_OPEN | base::File::FLAG_READ);
+  UMA_HISTOGRAM_TIMES("Hyphenation.Open.File", timer.Elapsed());
   return file;
 }