Add the page url to plugin crashes to aid debugging.

chrome/plugin/webplugin_proxy.cc

Index: chrome/plugin/webplugin_proxy.cc
===================================================================
--- chrome/plugin/webplugin_proxy.cc	(revision 20181)
+++ chrome/plugin/webplugin_proxy.cc	(working copy)
@@ -13,6 +13,7 @@
 #include "base/singleton.h"
 #include "base/waitable_event.h"
 #include "build/build_config.h"
+#include "chrome/common/child_process_logging.h"
 #include "chrome/common/plugin_messages.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/plugin/npobject_proxy.h"
@@ -35,7 +36,8 @@
 WebPluginProxy::WebPluginProxy(
     PluginChannel* channel,
     int route_id,
-    WebPluginDelegate* delegate)
+    WebPluginDelegate* delegate,
+    const GURL& page_url)
     : channel_(channel),
       route_id_(route_id),
       cp_browsing_context_(0),
@@ -43,6 +45,7 @@
       plugin_element_(NULL),
       delegate_(delegate),
       waiting_for_paint_(false),
+      page_url_(page_url),
       ALLOW_THIS_IN_INITIALIZER_LIST(runnable_method_factory_(this))
 {
 }
@@ -159,10 +162,9 @@
   if (!success)
     return NULL;
 
-  window_npobject_ = NPObjectProxy::Create(channel_,
-                                           npobject_route_id,
-                                           npobject_ptr,
-                                           modal_dialog_event_.get());
+  window_npobject_ = NPObjectProxy::Create(
+      channel_, npobject_route_id, npobject_ptr, modal_dialog_event_.get(),
+      page_url_);
 
   return window_npobject_;
 }
@@ -179,10 +181,9 @@
   if (!success)
     return NULL;
 
-  plugin_element_ = NPObjectProxy::Create(channel_,
-                                          npobject_route_id,
-                                          npobject_ptr,
-                                          modal_dialog_event_.get());
+  plugin_element_ = NPObjectProxy::Create(
+      channel_, npobject_route_id, npobject_ptr, modal_dialog_event_.get(),
+      page_url_);
 
   return plugin_element_;
 }
@@ -518,6 +519,8 @@
 }
 
 void WebPluginProxy::OnPaint(const gfx::Rect& damaged_rect) {
+  child_process_logging::ScopedActiveURLSetter url_setter(page_url_);
+
   Paint(damaged_rect);
   Send(new PluginHostMsg_InvalidateRect(route_id_, damaged_rect));
 }