Cherry-pick 598136f. rdar://123483436

    Unreviewed, reverting 275210@main.
    https://bugs.webkit.org/show_bug.cgi?id=269962

    Patch needs more work

    Reverted changeset:

    "Update identifier for WebKit process extensions"
    https://bugs.webkit.org/show_bug.cgi?id=269936
    https://commits.webkit.org/275210@main

    Canonical link: https://commits.webkit.org/275214@main

Canonical link: https://commits.webkit.org/272448.694@safari-7618-branch

Source/WebKit/Shared/AuxiliaryProcessExtensions/GPUExtension-Info.plist

@@ -5,7 +5,7 @@
 	<key>EXAppExtensionAttributes</key>
 	<dict>
 		<key>EXExtensionPointIdentifier</key>
-		<string>com.apple.web-browser-engine.gpu</string>
+		<string>com.apple.web-browser-engine.rendering</string>
 	</dict>
 	<key>CFBundleIdentifier</key>
 	<string>${PRODUCT_BUNDLE_IDENTIFIER}</string>

Source/WebKit/Shared/AuxiliaryProcessExtensions/WebContentExtension-CaptivePortal-Info.plist

@@ -5,7 +5,7 @@
 	<key>EXAppExtensionAttributes</key>
 	<dict>
 		<key>EXExtensionPointIdentifier</key>
-		<string>com.apple.web-browser-engine.content</string>
+		<string>com.apple.web-browser-engine.webcontent</string>
 	</dict>
 	<key>CFBundleIdentifier</key>
 	<string>${PRODUCT_BUNDLE_IDENTIFIER}</string>

Source/WebKit/Shared/AuxiliaryProcessExtensions/WebContentExtension-Info.plist

@@ -5,7 +5,7 @@
 	<key>EXAppExtensionAttributes</key>
 	<dict>
 		<key>EXExtensionPointIdentifier</key>
-		<string>com.apple.web-browser-engine.content</string>
+		<string>com.apple.web-browser-engine.webcontent</string>
 	</dict>
 	<key>CFBundleIdentifier</key>
 	<string>${PRODUCT_BUNDLE_IDENTIFIER}</string>