This change modifies behavior of crash dialog in case of aura metro.

chrome/browser/metro_viewer/chrome_metro_viewer_process_host_aurawin.cc

Index: chrome/browser/metro_viewer/chrome_metro_viewer_process_host_aurawin.cc
diff --git a/chrome/browser/metro_viewer/chrome_metro_viewer_process_host_aurawin.cc b/chrome/browser/metro_viewer/chrome_metro_viewer_process_host_aurawin.cc
index ef86c41788b2cb032c2f9744b406f72a0e90ed3d..9d3f6fdfaa5f0d53945030feefc74507181ea5ab 100644
--- a/chrome/browser/metro_viewer/chrome_metro_viewer_process_host_aurawin.cc
+++ b/chrome/browser/metro_viewer/chrome_metro_viewer_process_host_aurawin.cc
@@ -5,8 +5,11 @@
 #include "chrome/browser/metro_viewer/chrome_metro_viewer_process_host_aurawin.h"
 
 #include "ash/shell.h"
+#include "base/environment.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/strings/string_number_conversions.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/browser_process_platform_part_aurawin.h"
 #include "chrome/browser/chrome_notification_types.h"
@@ -19,6 +22,7 @@
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/host_desktop.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
+#include "chrome/common/env_vars.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/page_navigator.h"
@@ -67,6 +71,12 @@ void  ChromeMetroViewerProcessHost::OnChannelError() {
   // TODO(cpu): At some point we only close the browser. Right now this
   // is very convenient for developing.
   DLOG(INFO) << "viewer channel error : Quitting browser";
+
+  // Set environment variable to let breakpad know that metro process wasn't
+  // connected.
+  scoped_ptr<base::Environment> env(base::Environment::Create());

[cpu_(ooo_6.6-7.5), 2013/08/27 17:40:37]

don't use this method, just call the windows api directly or I think there might
another simpler wrapper in base.

[Shrikant Kelkar, 2013/08/27 22:29:30]

Done.

+  env->UnSetVar(env_vars::kMetroConnected);
+
   aura::RemoteRootWindowHostWin::Instance()->Disconnected();
   g_browser_process->ReleaseModule();
   CloseOpenAshBrowsers();
@@ -82,6 +92,14 @@ void  ChromeMetroViewerProcessHost::OnChannelError() {
   g_browser_process->platform_part()->OnMetroViewerProcessTerminated();
 }
 
+void  ChromeMetroViewerProcessHost::OnChannelConnected(int32 /*peer_pid*/) {
+  DLOG(INFO) << "ChromeMetroViewerProcessHost::OnChannelConnected: ";
+  // Set environment variable to let breakpad know that metro process was
+  // connected.
+  scoped_ptr<base::Environment> env(base::Environment::Create());
+  env->SetVar(env_vars::kMetroConnected, "1");
+}
+
 void ChromeMetroViewerProcessHost::OnSetTargetSurface(
     gfx::NativeViewId target_surface) {
   DLOG(INFO) << __FUNCTION__ << ", target_surface = " << target_surface;