Add a feature and devui flag to control display cutout

Bug: 1094366
Change-Id: Id07f37da45219bfdfffc7cc9ccdae60c97c1df01
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2365227Reviewed-by: Nate Fischer <ntfschr@chromium.org>
Commit-Queue: Changwan Ryu <changwan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#800174}

android_webview/browser/aw_feature_list.cc

@@ -25,6 +25,7 @@ namespace {
 // in other locations in the code base (e.g. content/, components/, etc).
 const base::Feature* kFeaturesExposedToJava[] = {
     &features::kWebViewConnectionlessSafeBrowsing,
+    &features::kWebViewDisplayCutout,
     &features::kWebViewTestFeature,
 };
 

android_webview/common/aw_features.cc

@@ -18,6 +18,10 @@ const base::Feature kWebViewBrotliSupport{"WebViewBrotliSupport",
 const base::Feature kWebViewConnectionlessSafeBrowsing{
     "WebViewConnectionlessSafeBrowsing", base::FEATURE_DISABLED_BY_DEFAULT};
 
+// Enable display cutout support for Android P and above.
+const base::Feature kWebViewDisplayCutout{"WebViewDisplayCutout",
+                                          base::FEATURE_DISABLED_BY_DEFAULT};
+
 // Only allow extra headers added via loadUrl() to be sent to the original
 // domain (eTLD+1); strip them from the request if a cross-domain redirect
 // occurs. kWebViewExtraHeadersSameOriginOnly is stricter; when that's enabled,

android_webview/common/aw_features.h

@@ -16,6 +16,7 @@ namespace features {
 // Alphabetical:
 extern const base::Feature kWebViewBrotliSupport;
 extern const base::Feature kWebViewConnectionlessSafeBrowsing;
+extern const base::Feature kWebViewDisplayCutout;
 extern const base::Feature kWebViewExtraHeadersSameDomainOnly;
 extern const base::Feature kWebViewExtraHeadersSameOriginOnly;
 extern const base::Feature kWebViewOriginCheckForStreamReader;

android_webview/java/src/org/chromium/android_webview/common/AwFeatures.java

@@ -14,6 +14,8 @@ public final class AwFeatures {
     public static final String WEBVIEW_CONNECTIONLESS_SAFE_BROWSING =
             "WebViewConnectionlessSafeBrowsing";
 
+    public static final String WEBVIEW_DISPLAY_CUTOUT = "WebViewDisplayCutout";
+
     public static final String WEBVIEW_EXTRA_HEADERS_SAME_DOMAIN_ONLY =
             "WebViewExtraHeadersSameDomainOnly";
 

android_webview/java/src/org/chromium/android_webview/common/ProductionSupportedFlagList.java

@@ -83,5 +83,7 @@ public final class ProductionSupportedFlagList {
             Flag.baseFeature("WebComponentsV0",
                     "Re-enables the deprecated Web Components v0 features (Shadow DOM v0, Custom "
                             + "Elements v0, and HTML Imports)."),
+            Flag.baseFeature(AwFeatures.WEBVIEW_DISPLAY_CUTOUT,
+                    "Enables display cutout (notch) support in WebView for Android P and above."),
     };
 }