mash: Store chrome --mash crash key metadata in shared memory

ash/common/accelerators/debug_commands.cc

Index: ash/common/accelerators/debug_commands.cc
diff --git a/ash/common/accelerators/debug_commands.cc b/ash/common/accelerators/debug_commands.cc
index 1b7d3b20e45b58c9e5805a8c3b88499c3371a49a..c4af569e68041e7b24095a1a2d02f8afd717a4eb 100644
--- a/ash/common/accelerators/debug_commands.cc
+++ b/ash/common/accelerators/debug_commands.cc
@@ -17,6 +17,7 @@
 #include "ash/common/wm_window_property.h"
 #include "ash/root_window_controller.h"
 #include "base/command_line.h"
+#include "base/debug/crash_logging.h"
 #include "base/metrics/user_metrics.h"
 #include "base/metrics/user_metrics_action.h"
 #include "base/strings/utf_string_conversions.h"
@@ -149,6 +150,8 @@ void HandleToggleTouchView() {
 }
 
 void HandleTriggerCrash() {
+  // Allow manual testing of crash keys.
+  base::debug::SetCrashKeyValue("url-chunk", "crash-url-chunk-for-testing");

[hashimoto, 2017/03/02 07:42:22]

This line depends on chrome/common/crash_keys.cc to register kActiveURL
(="url-chunk") as a crash key, when running as part of chrome, right?
IIUC ash shouldn't depend on chrome so please avoid doing this.

   CHECK(false) << "Intentional crash via debug accelerator.";
 }