Fixed crash due to refer widget very early

[simonhong]

Resolves brave/brave-browser#30178

In the view control, GetWidget() should be called when it's added to widget.

Submitter Checklist:

• I confirm that no security/privacy review is needed, or that I have requested one
• There is a ticket for my issue
• Used Github auto-closing keywords in the PR description above
• Wrote a good PR/commit description
• Squashed any review feedback or "fixup" commits before merge, so that history is a record of what happened in the repo, not your PR
• Added appropriate labels (QA/Yes or QA/No; release-notes/include or release-notes/exclude; OS/...) to the associated issue
• Checked the PR locally:
  • npm run test -- brave_browser_tests, npm run test -- brave_unit_tests wiki
  • npm run lint, npm run presubmit wiki, npm run gn_check, npm run tslint
• Ran git rebase master (if needed)

Reviewer Checklist:

• A security review is not needed, or a link to one is included in the PR description
• New files have MPL-2.0 license header
• Adequate test coverage exists to prevent regressions
• Major classes, functions and non-trivial code blocks are well-commented
• Changes in component dependencies are properly reflected in gn
• Code follows the style guide
• Test plan is specified in PR before merging

After-merge Checklist:

• The associated issue milestone is set to the smallest version that the
  changes has landed on
• All relevant documentation has been updated, for instance:
  • https://github.com/brave/brave-browser/wiki/Deviations-from-Chromium-(features-we-disable-or-remove)
  • https://github.com/brave/brave-browser/wiki/Proxy-redirected-URLs
  • https://github.com/brave/brave-browser/wiki/Fingerprinting-Protections
  • https://github.com/brave/brave-browser/wiki/Brave%E2%80%99s-Use-of-Referral-Codes
  • https://github.com/brave/brave-browser/wiki/Custom-Headers
  • https://github.com/brave/brave-browser/wiki/Web-Compatibility-Exceptions-in-Brave
  • https://github.com/brave/brave-browser/wiki/QA-Guide
  • https://github.com/brave/brave-browser/wiki/P3A

Test Plan:

TextRecognitionBrowserTest.TextRecognitionTest

Manual test - check linked issue

[sangwoo108]

LGTM

[MadhaviSeelam]

Verification PASSED using

Brave | 1.53.26 Chromium: 113.0.5672.77 (Official Build) nightly (64-bit)
-- | --
Revision | c4236862955e005c2187105415ac4a2ecf86dff1-refs/branch-heads/5672_62@{#3}
OS | Windows 11 Version 22H2 (Build 22621.1555)

• Installed 1.53.26
• launched Brave
• navigated to search.brave.com in a new tab
• searched for blue jay bird
• right clicked on a thumbnail to open context menu
• selected Copy Text From Image

Confirmed Brave no longer crashed and a dialog is shown

example	example

[stephendonner]

Verified PASSED using

Brave	1.53.26 Chromium: 113.0.5672.77 (Official Build) nightly (x86_64)
Revision	c4236862955e005c2187105415ac4a2ecf86dff1-refs/branch-heads/5672_62@{#3}
OS	macOS Version 11.7.6 (Build 20G1231)

Steps:

1. installed 1.53.26
2. launched Brave
3. searched for blue jay bird
4. context-clicked on an article's video-thumbnail preview
5. chose Copy Text From Image

Confirmed I no longer crash

Copy Text From Image	Text copy failed