content: Not all memory creation failures are out of memory errors.

content/child/child_thread_impl.cc

Index: content/child/child_thread_impl.cc
diff --git a/content/child/child_thread_impl.cc b/content/child/child_thread_impl.cc
index f9067a14cd64b0891077f0e5b489424254f5ae1f..0b5a69168c708b5c425758bc05c149bd00698ba1 100644
--- a/content/child/child_thread_impl.cc
+++ b/content/child/child_thread_impl.cc
@@ -583,13 +583,14 @@ IPC::MessageRouter* ChildThreadImpl::GetRouter() {
 std::unique_ptr<base::SharedMemory> ChildThreadImpl::AllocateSharedMemory(
     size_t buf_size) {
   DCHECK(base::MessageLoop::current() == message_loop());
-  return AllocateSharedMemory(buf_size, this);
+  return AllocateSharedMemory(buf_size, this, nullptr);
 }
 
 // static
 std::unique_ptr<base::SharedMemory> ChildThreadImpl::AllocateSharedMemory(
     size_t buf_size,
-    IPC::Sender* sender) {
+    IPC::Sender* sender,
+    bool* out_of_memory) {
   std::unique_ptr<base::SharedMemory> shared_buf;
   // Ask the browser to create the shared memory, since this is blocked by the
   // sandbox on most platforms.
@@ -599,11 +600,15 @@ std::unique_ptr<base::SharedMemory> ChildThreadImpl::AllocateSharedMemory(
     if (base::SharedMemory::IsHandleValid(shared_mem_handle)) {
       shared_buf.reset(new base::SharedMemory(shared_mem_handle, false));
     } else {
-      NOTREACHED() << "Browser failed to allocate shared memory";
+      LOG(WARNING) << "Browser failed to allocate shared memory";
+      if (out_of_memory)
+        *out_of_memory = true;
       return nullptr;
     }
   } else {
     // Send is allowed to fail during shutdown. Return null in this case.
+    if (out_of_memory)
+      *out_of_memory = false;
     return nullptr;
   }
   return shared_buf;