Update feature name kWebViewZeroCopyVideo string.

Update feature name string to be consistent with feature variable name.

Bug: 1091945
Change-Id: I54ba99dc465cdc40e4189fd642647bfd2d85042a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2348335
Auto-Submit: vikas soni <vikassoni@chromium.org>
Commit-Queue: Frank Liberato <liberato@chromium.org>
Reviewed-by: Frank Liberato <liberato@chromium.org>
Cr-Commit-Position: refs/heads/master@{#796925}

media/base/media_switches.cc

@@ -584,7 +584,7 @@ const base::Feature kUsePooledSharedImageVideoProvider{
     "UsePooledSharedImageVideoProvider", base::FEATURE_ENABLED_BY_DEFAULT};
 
 // Used to enable/disable zero copy video path on webview for MCVD.
-const base::Feature kWebViewZeroCopyVideo{"EnableZeroCopyVideoOnWebview",
+const base::Feature kWebViewZeroCopyVideo{"WebViewZeroCopyVideo",
                                           base::FEATURE_DISABLED_BY_DEFAULT};
 #endif  // defined(OS_ANDROID)