Sort some items in flag_descriptions.cc

This brings the first part of the .cc file in line with the header, as promised
in the patch that ordered the header.

Remove 2 obsolete items in the header that had no definition, and re-sort one
thing added in the wrong place.

TBR=pkasing@chromium.org

Change-Id: I6427c182d11cd164d3a0ac42fc0280d8bd806730
Reviewed-on: https://chromium-review.googlesource.com/562646
Commit-Queue: Brett Wilson <brettw@chromium.org>
Reviewed-by: Brett Wilson <brettw@chromium.org>
Cr-Commit-Position: refs/heads/master@{#485075}

chrome/browser/flag_descriptions.h

@@ -127,9 +127,6 @@ extern const char kDefaultTileWidthVenti[];
 extern const char kDebugShortcutsName[];
 extern const char kDebugShortcutsDescription[];
 
-extern const char kDelayNavigationName[];
-extern const char kDelayNavigationDescription[];
-
 extern const char kDeviceDiscoveryNotificationsName[];
 extern const char kDeviceDiscoveryNotificationsDescription[];
 
@@ -169,9 +166,6 @@ extern const char kEasyUnlockProximityDetectionDescription[];
 extern const char kEmbeddedExtensionOptionsName[];
 extern const char kEmbeddedExtensionOptionsDescription[];
 
-extern const char kEnableAdjustableLargeCursorName[];
-extern const char kEnableAdjustableLargeCursorDescription[];
-
 extern const char kEnableAsmWasmName[];
 extern const char kEnableAsmWasmDescription[];
 
@@ -304,6 +298,9 @@ extern const char kExperimentalCanvasFeaturesDescription[];
 extern const char kExperimentalExtensionApisName[];
 extern const char kExperimentalExtensionApisDescription[];
 
+extern const char kExperimentalFullscreenExitUIName[];
+extern const char kExperimentalFullscreenExitUIDescription[];
+
 extern const char kExperimentalHotwordHardwareName[];
 extern const char kExperimentalHotwordHardwareDescription[];
 
@@ -346,9 +343,6 @@ extern const char kEffectiveConnectionType2GDescription[];
 extern const char kEffectiveConnectionType3GDescription[];
 extern const char kEffectiveConnectionType4GDescription[];
 
-extern const char kExperimentalFullscreenExitUIName[];
-extern const char kExperimentalFullscreenExitUIDescription[];
-
 extern const char kFillOnAccountSelectName[];
 extern const char kFillOnAccountSelectDescription[];