AW: Remove dead flag for Safe Browsing

Safe Browsing is enabled by default, WEBVIEW_ENABLE_SAFEBROWSING_SUPPORT becomes dead.
No change to logic.

Bug: 799317
Change-Id: I04e0c6d7a62a29940d6fd3f423103bd28ecffee6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1685019Reviewed-by: Nate Fischer <ntfschr@chromium.org>
Reviewed-by: Changwan Ryu <changwan@chromium.org>
Commit-Queue: Jinsong Fan <fanjinsong@sogou-inc.com>
Cr-Commit-Position: refs/heads/master@{#676271}

android_webview/common/aw_switches.cc

@@ -10,10 +10,6 @@ const char kWebViewLogJsConsoleMessages[] = "webview-log-js-console-messages";
 
 const char kWebViewSandboxedRenderer[] = "webview-sandboxed-renderer";
 
-// used to enable safebrowsing functionality in webview
-const char kWebViewEnableSafeBrowsingSupport[] =
-    "webview-enable-safebrowsing-support";
-
 // used to disable safebrowsing functionality in webview
 const char kWebViewDisableSafeBrowsingSupport[] =
     "webview-disable-safebrowsing-support";

android_webview/common/aw_switches.h

@@ -9,7 +9,6 @@ namespace switches {
 
 extern const char kWebViewLogJsConsoleMessages[];
 extern const char kWebViewSandboxedRenderer[];
-extern const char kWebViewEnableSafeBrowsingSupport[];
 extern const char kWebViewDisableSafeBrowsingSupport[];
 extern const char kWebViewEnableSharedImage[];
 extern const char kWebViewEnableVulkan[];

android_webview/java/src/org/chromium/android_webview/AwSwitches.java

@@ -17,11 +17,6 @@ public final class AwSwitches {
     // Native switch kWebViewSandboxedRenderer.
     public static final String WEBVIEW_SANDBOXED_RENDERER = "webview-sandboxed-renderer";
 
-    // Enables safebrowsing functionality in webview.
-    // Native switch kWebViewEnableSafeBrowsingSupport.
-    public static final String WEBVIEW_ENABLE_SAFEBROWSING_SUPPORT =
-            "webview-enable-safebrowsing-support";
-
     // Disables safebrowsing functionality in webview.
     // Native switch kWebViewDisableSafeBrowsingSupport.
     public static final String WEBVIEW_DISABLE_SAFEBROWSING_SUPPORT =