Disable App Transport Security for iOS

As a browser, web_shell needs to be able to make http requests.

BUG=None

Review URL: https://codereview.chromium.org/1172383002

Cr-Commit-Position: refs/heads/master@{#333801}

ios/web/shell/Info.plist

@@ -24,6 +24,11 @@
 	<string>1.0</string>
 	<key>LSRequiresIPhoneOS</key>
 	<true/>
+	<key>NSAppTransportSecurity</key>
+	<dict>
+		<key>NSAllowsArbitraryLoads</key>
+		<true/>
+	</dict>
 	<key>UIRequiredDeviceCapabilities</key>
 	<array>
 		<string>armv7</string>