Stack sampling profiler: run the profiler in the GPU process on trunk builds

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index 61fdcde83e8ad1fb92389654ef7fdc84a694fa7c..10ca4e036211b64a8fcbf1d842407563b2a28bd4 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -932,6 +932,9 @@ const char kSSLKeyLogFile[]               = "ssl-key-log-file";
 // Starts the browser maximized, regardless of any previous settings.
 const char kStartMaximized[]                = "start-maximized";
 
+// Starts the stack sampling profiler in the child process.
+const char kStartStackProfiler[]            = "start-stack-profiler";
+
 // Sets the supervised user ID for any loaded or newly created profile to the
 // given value. Pass an empty string to mark the profile as non-supervised.
 // Used for testing.