ResolverProxy::Init does not check for allocation failure

[msandstedt]

Problem

chip::Platform::New can return nullptr on allocation failure. But ResolverProxy::Init is not checking for this:

class ResolverProxy : public Resolver
{
public:
    ResolverProxy() {}

    // Resolver interface.
    CHIP_ERROR Init(Inet::InetLayer * inetLayer = nullptr) override
    {   
        ReturnErrorOnFailure(chip::Dnssd::Resolver::Instance().Init(inetLayer));
        VerifyOrReturnError(mDelegate == nullptr, CHIP_ERROR_INCORRECT_STATE);
        mDelegate = chip::Platform::New<ResolverDelegateProxy>();
        return CHIP_NO_ERROR;
    }  

Proposed Solution

diff --git a/src/lib/dnssd/ResolverProxy.h b/src/lib/dnssd/ResolverProxy.h
index 88ac1d407..bd449ff50 100644
--- a/src/lib/dnssd/ResolverProxy.h
+++ b/src/lib/dnssd/ResolverProxy.h
@@ -68,7 +68,7 @@ public:
         ReturnErrorOnFailure(chip::Dnssd::Resolver::Instance().Init(inetLayer));
         VerifyOrReturnError(mDelegate == nullptr, CHIP_ERROR_INCORRECT_STATE);
         mDelegate = chip::Platform::New<ResolverDelegateProxy>();
-        return CHIP_NO_ERROR;
+        return mDelegate != nullptr ? CHIP_NO_ERROR : CHIP_ERROR_NO_MEMORY;
     }
 
     void SetResolverDelegate(ResolverDelegate * delegate) override