Add a new field "source" in launchData of chrome.app.runtime.onLaunched() to trace launch source.

chrome/browser/ui/extensions/application_launch.cc

Index: chrome/browser/ui/extensions/application_launch.cc
diff --git a/chrome/browser/ui/extensions/application_launch.cc b/chrome/browser/ui/extensions/application_launch.cc
index 74ce425b27a4c7a6b53dae6f9dbbeb69348873bd..a09cac83c3672bcab22daf63035dce2258640b73 100644
--- a/chrome/browser/ui/extensions/application_launch.cc
+++ b/chrome/browser/ui/extensions/application_launch.cc
@@ -8,6 +8,7 @@
 
 #include "apps/launcher.h"
 #include "base/command_line.h"
+#include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/app_mode/app_mode_utils.h"
@@ -302,8 +303,13 @@ WebContents* OpenEnabledApplication(const AppLaunchParams& params) {
     PerAppSettingsServiceFactory::GetForBrowserContext(profile)->
         SetDesktopLastLaunchedFrom(extension->id(), params.desktop_type);
 
-    apps::LaunchPlatformAppWithCommandLine(
-        profile, extension, params.command_line, params.current_directory);
+    VLOG(2) << "Launch source: " << params.source;
+
+    apps::LaunchPlatformAppWithCommandLine(profile,
+                                           extension,
+                                           params.command_line,
+                                           params.current_directory,
+                                           params.source);
     return NULL;
   }
 
@@ -344,7 +350,9 @@ AppLaunchParams::AppLaunchParams(Profile* profile,
       desktop_type(chrome::GetActiveDesktop()),
       override_url(),
       override_bounds(),
-      command_line(CommandLine::NO_PROGRAM) {}
+      command_line(CommandLine::NO_PROGRAM),
+      source(extensions::SOURCE_UNKNOWN) {
+}
 
 AppLaunchParams::AppLaunchParams(Profile* profile,
                                  const extensions::Extension* extension,
@@ -356,7 +364,8 @@ AppLaunchParams::AppLaunchParams(Profile* profile,
       desktop_type(chrome::GetActiveDesktop()),
       override_url(),
       override_bounds(),
-      command_line(CommandLine::NO_PROGRAM) {
+      command_line(CommandLine::NO_PROGRAM),
+      source(extensions::SOURCE_UNKNOWN) {
   // Look up the app preference to find out the right launch container. Default
   // is to launch as a regular tab.
   container =
@@ -374,7 +383,8 @@ AppLaunchParams::AppLaunchParams(Profile* profile,
       desktop_type(desktop_type),
       override_url(),
       override_bounds(),
-      command_line(CommandLine::NO_PROGRAM) {
+      command_line(CommandLine::NO_PROGRAM),
+      source(extensions::SOURCE_UNKNOWN) {
   if (disposition == NEW_FOREGROUND_TAB || disposition == NEW_BACKGROUND_TAB) {
     container = extensions::LAUNCH_CONTAINER_TAB;
   } else if (disposition == NEW_WINDOW) {