Set crash key if WM_QUIT message is received on GPU message loop.

Threads seem to be exiting unexpectedly, so to help debugging set a
crash key if an unexpected WM_QUIT message is received.

BUG=647068
TBR=scottmg@chromium.org

Review-Url: https://codereview.chromium.org/2342713002
Cr-Commit-Position: refs/heads/master@{#419057}

base/message_loop/message_pump_win.cc

@@ -9,6 +9,7 @@
 
 #include <limits>
 
+#include "base/debug/crash_logging.h"
 #include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/metrics/histogram.h"
@@ -636,6 +637,11 @@ bool MessagePumpForGpu::ProcessNextMessage() {
     return false;
 
   if (msg.message == WM_QUIT) {
+    // Try to figure out if we've received a WM_QUIT targeted towards a
+    // window. http://crbug.com/647068
+    // TODO(jbauman): Remove once we've got some data about this.
+    base::debug::SetCrashKeyValue("received_quit_message",
+                                  base::StringPrintf("%d", !!msg.hwnd));
     // Repost the QUIT message so that it will be retrieved by the primary
     // GetMessage() loop.
     state_->should_quit = true;

blimp/engine/app/blimp_engine_crash_keys.cc

@@ -105,6 +105,9 @@ size_t RegisterEngineCrashKeys() {
       // Temporary for https://crbug.com/630496.
       { "swdh_get_registration_cannot_host_url", crash_keys::kLargeSize },
       { "swdh_get_registration_cannot_document_url", crash_keys::kLargeSize },
+
+      // Temporary for https://crbug.com/647068.
+      { "received_quit_message", crash_keys::kSmallSize },
     };
 
   return base::debug::InitCrashKeys(engine_keys, arraysize(engine_keys),

chrome/app/chrome_crash_reporter_client_win.cc

@@ -179,6 +179,9 @@ size_t RegisterCrashKeysHelper() {
       // Temporary for https://crbug.com/630496.
       {"swdh_get_registration_cannot_host_url", crash_keys::kLargeSize},
       {"swdh_get_registration_cannot_document_url", crash_keys::kLargeSize},
+
+      // Temporary for https://crbug.com/647068.
+      {"received_quit_message", crash_keys::kSmallSize},
   };
 
   // This dynamic set of keys is used for sets of key value pairs when gathering

chrome/common/crash_keys.cc

@@ -228,6 +228,9 @@ size_t RegisterChromeCrashKeys() {
     // Temporary for https://crbug.com/630496.
     { "swdh_get_registration_cannot_host_url", crash_keys::kLargeSize },
     { "swdh_get_registration_cannot_document_url", crash_keys::kLargeSize },
+
+    // Temporary for https://crbug.com/647068.
+    { "received_quit_message", crash_keys::kSmallSize },
   };
 
   // This dynamic set of keys is used for sets of key value pairs when gathering