Ensure that the browser’s copy of page id is in sync with the renderer’s.

chrome/common/crash_keys.cc

Index: chrome/common/crash_keys.cc
diff --git a/chrome/common/crash_keys.cc b/chrome/common/crash_keys.cc
index b96a3ac36c8c8f0112af854b54c242f0f70cb350..836e1954e072876d7c75f01fccd7dd783dc65297 100644
--- a/chrome/common/crash_keys.cc
+++ b/chrome/common/crash_keys.cc
@@ -167,6 +167,12 @@ size_t RegisterChromeCrashKeys() {
     { "channel_error_bt", kMediumSize },
     { "remove_route_bt", kMediumSize },
     { "rwhvm_window", kMediumSize },
+    // The following keys are for diagnosing crashes in http://crbug.com/369661.
+    // They will not be permanent.
+    { "renderer_page_id", kSmallSize },
+    { "browser_page_id", kSmallSize },
+    { "last_committed_page_id", kSmallSize },
+    // End http://crbug.com/369661
     // media/:
     { "VideoCaptureDeviceQTKit", kSmallSize },
 #endif