Reland of place string::find(prefix) == 0 pattern with base::StartsWith().

base/trace_event/trace_config.cc

Index: base/trace_event/trace_config.cc
diff --git a/base/trace_event/trace_config.cc b/base/trace_event/trace_config.cc
index d4dc2cc2e4e3594abf9dacc02117c19a6de0fd40..ebdddd38987d409ff561625d1e560a21bf40253e 100644
--- a/base/trace_event/trace_config.cc
+++ b/base/trace_event/trace_config.cc
@@ -14,6 +14,7 @@
 #include "base/strings/pattern.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_tokenizer.h"
+#include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/trace_event/memory_dump_manager.h"
 #include "base/trace_event/memory_dump_request_args.h"
@@ -411,7 +412,8 @@
       if (category.empty())
         continue;
       // Synthetic delays are of the form 'DELAY(delay;option;option;...)'.
-      if (category.find(kSyntheticDelayCategoryFilterPrefix) == 0 &&
+      if (base::StartsWith(category, kSyntheticDelayCategoryFilterPrefix,
+                           base::CompareCase::SENSITIVE) &&
           category.at(category.size() - 1) == ')') {
         category = category.substr(
             strlen(kSyntheticDelayCategoryFilterPrefix),