[Mac stack sampler] Indicate profiler is supported on dev

Collapsed the Windows and Mac paths since they're now the same logic,
but happy to do it the other way if that's better.

Bug: 531673
Change-Id: Iff49448d82115bb651ba00626dc33ab19d23c3b8
Reviewed-on: https://chromium-review.googlesource.com/695568Reviewed-by: Mike Wittman <wittman@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Leonard Grey <lgrey@chromium.org>
Cr-Commit-Position: refs/heads/master@{#505739}

chrome/common/stack_sampling_configuration.cc

@@ -24,7 +24,7 @@ base::LazyInstance<StackSamplingConfiguration>::Leaky g_configuration =
 
 // The profiler is currently only implemented for Windows x64 and Mac x64.
 bool IsProfilerSupported() {
-#if defined(OS_WIN) && defined(ARCH_CPU_X86_64)
+#if (defined(OS_WIN) && defined(ARCH_CPU_X86_64)) || defined(OS_MACOSX)
   #if defined(GOOGLE_CHROME_BUILD)
     // Only run on canary and dev.
     const version_info::Channel channel = chrome::GetChannel();
@@ -33,13 +33,6 @@ bool IsProfilerSupported() {
   #else
     return true;
   #endif
-#elif defined(OS_MACOSX)
-  // Only run on canary for now.
-  #if defined(GOOGLE_CHROME_BUILD)
-  return chrome::GetChannel() == version_info::Channel::CANARY;
-  #else
-  return true;
-  #endif
 #else
   return false;
 #endif