Remove tabCapture about:flags switch.

chrome/app/generated_resources.grd

Index: chrome/app/generated_resources.grd
diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index 5de6a6bad9839a4350b1977916a54a43bcfb0b43..6e628ca143101d1e0dd8be1633b1e3f3f2dfc8ae 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -6426,12 +6426,6 @@ Keep your key file in a safe place. You will need it to create new versions of y
       <message name="IDS_DISABLE_TOUCH_ADJUSTMENT_DESCRIPTION" desc="Description of the disable touch adjustment flag.">
         Disables touch adjustment support.  Touch adjustment is the process of refining the position of a touch gesture in order to compensate for touches having poor resolution compared to a mouse.
       </message>
-      <message name="IDS_ENABLE_TAB_CAPTURE_NAME" desc="Title of the enable tab capture flag." >
-        Enable Tab Capture API
-      </message>
-      <message name="IDS_ENABLE_TAB_CAPTURE_DESCRIPTION" desc="Description of the enable tab capture flag.">
-        Enables experimental tab capture API to generate video streams of tab content.
-      </message>
       <message name="IDS_ENABLE_BACKLOADER_NAME" desc="Title of the enable background loader flag." >
         Enable background loader component for hosted applications
       </message>