[tracing] Allow enabling heap profiling from chrome://flags

chrome/browser/flag_descriptions.cc

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/flag_descriptions.h"
 
 namespace flag_descriptions {
 
 //  Material Design version of chrome://bookmarks
 
@@ skipping 3031 matching lines @@
     "Policy used when deciding if audio or video is allowed to autoplay.";
 
 const char kAutoplayPolicyNoUserGestureRequired[] =
     "No user gesture is required.";
 
 const char kAutoplayPolicyUserGestureRequired[] = "User gesture is required.";
 
 const char kAutoplayPolicyCrossOriginUserGestureRequired[] =
     "User gesture is required for cross-origin iframes.";
 
+const char kEnableHeapProfilingName[] = "Heap profiling";
+
+const char kEnableHeapProfilingDescription[] = "Enables heap profiling.";
+
+extern const char kEnableHeapProfilingModePseudo[] = "Enabled (pseudo mode)";

[Wez, 2017/04/28 17:17:12]

Why are these extern and not the ones above?

[DmitrySkiba, 2017/04/28 19:39:13]

Good catch, thanks!

+
+extern const char kEnableHeapProfilingModeNative[] = "Enabled (native mode)";
+
+extern const char kEnableHeapProfilingTaskProfiler[] = "Enabled (task mode)";
+
 }  // namespace flag_descriptions