Add missing .h files to .gn files that have a .cc file next to it in the gn file already.

third_party/WebKit/Source/web/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 import("//third_party/WebKit/Source/bindings/bindings.gni")
 import("//third_party/WebKit/Source/config.gni")
 import("//third_party/WebKit/Source/core/core.gni")
 import("//third_party/WebKit/Source/modules/modules.gni")
@@ skipping 74 matching lines @@
     "InspectorEmulationAgent.h",
     "InspectorOverlay.cpp",
     "InspectorOverlay.h",
     "InspectorRenderingAgent.cpp",
     "InspectorRenderingAgent.h",
     "LinkHighlightImpl.cpp",
     "LinkHighlightImpl.h",
     "LocalFileSystemClient.cpp",
     "LocalFileSystemClient.h",
     "LocalFrameClientImpl.cpp",
+    "LocalFrameClientImpl.h",
     "MediaKeysClientImpl.cpp",
     "MediaKeysClientImpl.h",
     "NavigatorContentUtilsClientImpl.cpp",
     "NavigatorContentUtilsClientImpl.h",
     "OpenedFrameTracker.cpp",
     "OpenedFrameTracker.h",
     "PageOverlay.cpp",
     "PageOverlay.h",
     "PageWidgetDelegate.cpp",
     "PageWidgetDelegate.h",
@@ skipping 343 matching lines @@
 
   if (is_android) {
     deps += [
       "//base:base_java",
       "//content/public/android:content_java",
       "//content/shell/android:content_shell_assets",
       "//net/android:net_java",
     ]
   }
 }