PoolingBlockTracker error message when enabling crypto wallet

[srirambv]

Description

PoolingBlockTracker error message when enabling crypto wallet

Steps to Reproduce

1. Install component 0.1.34
2. Open background page
3. Enable Crypto wallet, console logs error

Actual result:

Expected result:

No errors

Reproduces how often:

Easy

Brave version (brave://version info)

Brave	1.2.41 Chromium: 79.0.3945.88 (Official Build) (64-bit)
Revision	c2a58a36b9411c80829b4b154bfcab97e581f1f3-refs/branch-heads/3945@{#954}
OS	Linux
Component	0.1.34

Version/Channel Information:

• Can you reproduce this issue with the current release? Yes
• Can you reproduce this issue with the beta channel? Yes
• Can you reproduce this issue with the dev channel? Yes
• Can you reproduce this issue with the nightly channel? Yes

Other Additional Information:

• Does the issue resolve itself when disabling Brave Shields? N/A
• Does the issue resolve itself when disabling Brave Rewards? N/A
• Is the issue reproducible on the latest version of Chrome? N/A

Miscellaneous Information:

[srirambv]

Verification passed on

Brave	1.4.55 Chromium: 79.0.3945.117 (Official Build) dev (64-bit)
Revision	04f0a055010adab4484f7497fbfdbf312c307f1d-refs/branch-heads/3945@{#1019}
OS	Linux
Component	0.1.35

• Verified no error on console when component is loaded and brave://wallet is loaded

---

Verification passed on

Brave	1.3.87 Chromium: 79.0.3945.117 (Official Build) beta (64-bit)
Revision	04f0a055010adab4484f7497fbfdbf312c307f1d-refs/branch-heads/3945@{#1019}
OS	Windows 10 OS Version 1803 (Build 17134.523)
Component	0.1.35

• Verified no error on console when component is loaded and brave://wallet is loaded

---

Verification passed on

Brave	1.5.18 Chromium: 79.0.3945.117 (Official Build) nightly (64-bit)
Revision	04f0a055010adab4484f7497fbfdbf312c307f1d-refs/branch-heads/3945@{#1019}
OS	macOS Version 10.15.1 (Build 19B88)
Component	0.1.35

• Verified no error on console when component is loaded and brave://wallet is loaded