[Live Caption] Make the SODAInstaller destructor virtual and override it

in SODAInstallerImplChromeOS.

This fixes an overlooked nit whereby the SODAInstallerImpl was
overriding a non-virtual destructor in its parent class, and the
SODAInstallerImplChromeOS was not.

Bug: 1055150
Change-Id: If039f7e046201bcc776f493338c0bffcea365a04
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2572942Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Commit-Queue: Abigail Klein <abigailbklein@google.com>
Cr-Commit-Position: refs/heads/master@{#833782}

chrome/browser/accessibility/soda_installer.h

@@ -30,7 +30,7 @@ class SODAInstaller {
   };
 
   SODAInstaller();
-  ~SODAInstaller();
+  virtual ~SODAInstaller();
   SODAInstaller(const SODAInstaller&) = delete;
   SODAInstaller& operator=(const SODAInstaller&) = delete;
 

chrome/browser/chromeos/accessibility/soda_installer_impl_chromeos.h

@@ -17,7 +17,7 @@ namespace speech {
 class SODAInstallerImplChromeOS : public SODAInstaller {
  public:
   SODAInstallerImplChromeOS();
-  ~SODAInstallerImplChromeOS();
+  ~SODAInstallerImplChromeOS() override;
   SODAInstallerImplChromeOS(const SODAInstallerImplChromeOS&) = delete;
   SODAInstallerImplChromeOS& operator=(const SODAInstallerImplChromeOS&) =
       delete;