Store the callstack of the IPC sender of ViewMsg_New.

content/renderer/render_frame_impl.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/render_frame_impl.h"
 
 #include <map>
 #include <string>
 
 #include "base/auto_reset.h"
@@ skipping 674 matching lines @@
         duplicate->render_view()->debug_info();
     unsigned long duplicate_stack_debug_info[128];
     unsigned long stack_debug_info[128];
     const int size = debug_info.size() > 128 ? 128 : debug_info.size();
     const int duplicate_size =
         duplicate_debug_info.size() > 128 ? 128 : duplicate_debug_info.size();
     for (int i = 0; i < size; i++)
       stack_debug_info[i] = debug_info[i];
     for (int i = 0; i < duplicate_size; i++)
       duplicate_stack_debug_info[i] = duplicate_debug_info[i];
-    (void) stack_debug_info;
-    (void) duplicate_stack_debug_info;
     CHECK(result.second) << "Inserting a duplicate item.";
+    base::debug::Alias(&stack_debug_info);
+    base::debug::Alias(&duplicate_stack_debug_info);
+    for (int i = 0; i < size; i++)

[nasko, 2015/03/17 22:45:20]

nit: I'd add a comment above to explain why this seemingly unneeded work is
being performed. I know it is temporary code, but it is good to have for the few
people that might see it before we revert it.

+      LOG(ERROR) << stack_debug_info[i];
+    for (int i = 0; i < duplicate_size; i++)
+      LOG(ERROR) << duplicate_stack_debug_info[i];
   }
 
   RenderThread::Get()->AddRoute(routing_id_, this);
 
   render_view_->RegisterRenderFrame(this);
 
   // Everything below subclasses RenderFrameObserver and is automatically
   // deleted when the RenderFrame gets deleted.
 #if defined(OS_ANDROID)
   new GinJavaBridgeDispatcher(this);
@@ skipping 3849 matching lines @@
 
 #if defined(ENABLE_BROWSER_CDMS)
 RendererCdmManager* RenderFrameImpl::GetCdmManager() {
   if (!cdm_manager_)
     cdm_manager_ = new RendererCdmManager(this);
   return cdm_manager_;
 }
 #endif  // defined(ENABLE_BROWSER_CDMS)
 
 }  // namespace content