feature flag for copying image

Add feature flag for copying image to system clipboard.

Bug: 163201
Cq-Include-Trybots: luci.chromium.try:ios-simulator-full-configs;master.tryserver.chromium.mac:ios-simulator-cronet
Change-Id: I8110f65f739891b01b82b866215b122dd93ac0aa
Reviewed-on: https://chromium-review.googlesource.com/1112661
Commit-Queue: Yi Su <mrsuyi@chromium.org>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Cr-Commit-Position: refs/heads/master@{#570085}

ios/chrome/browser/about_flags.mm

@@ -372,6 +372,9 @@ const flags_ui::FeatureEntry kFeatureEntries[] = {
     {"web-frame-messaging", flag_descriptions::kWebFrameMessagingName,
      flag_descriptions::kWebFrameMessagingDescription, flags_ui::kOsIos,
      FEATURE_VALUE_TYPE(web::features::kWebFrameMessaging)},
+    {"copy-image", flag_descriptions::kCopyImageName,
+     flag_descriptions::kCopyImageDescription, flags_ui::kOsIos,
+     FEATURE_VALUE_TYPE(kCopyImage)},
 };
 
 // Add all switches from experimental flags to |command_line|.

ios/chrome/browser/ios_chrome_flag_descriptions.cc

@@ -126,6 +126,10 @@ const char kContextMenuElementPostMessageDescription[] =
     "webkit postMessage call instead of directly returned from the JavaScript "
     "function.";
 
+const char kCopyImageName[] = "Copy Image";
+const char kCopyImageDescription[] =
+    "Enable copying image to system pasteboard via context menu.";
+
 const char kDragAndDropName[] = "Drag and Drop";
 const char kDragAndDropDescription[] = "Enable support for drag and drop.";
 

ios/chrome/browser/ios_chrome_flag_descriptions.h

@@ -101,6 +101,10 @@ extern const char kContextualSearchDescription[];
 extern const char kContextMenuElementPostMessageName[];
 extern const char kContextMenuElementPostMessageDescription[];
 
+// Title and description for the flag to enable copying image.
+extern const char kCopyImageName[];
+extern const char kCopyImageDescription[];
+
 // Title and description for the flag to enable drag and drop.
 extern const char kDragAndDropName[];
 extern const char kDragAndDropDescription[];

ios/chrome/browser/ui/ui_feature_flags.cc

@@ -21,3 +21,5 @@ const base::Feature kInfobarsUIReboot{"InfobarsUIReboot",
 
 const base::Feature kFirstResponderKeyWindow{"FirstResponderKeyWindow",
                                              base::FEATURE_ENABLED_BY_DEFAULT};
+
+const base::Feature kCopyImage{"CopyImage", base::FEATURE_DISABLED_BY_DEFAULT};

ios/chrome/browser/ui/ui_feature_flags.h

@@ -36,4 +36,7 @@ extern const base::Feature kInfobarsUIReboot;
 // responder.
 extern const base::Feature kFirstResponderKeyWindow;
 
+// Feature to copy image to system pasteboard via context menu.
+extern const base::Feature kCopyImage;
+
 #endif  // IOS_CHROME_BROWSER_UI_UI_FEATURE_FLAGS_H_