Remove chrome://flash page.

All information on this page is duplicate of information from other
sources.
The Flash plugin version and path can be found on chrome://version.
GPU information is present of chrome://gpu and crashes on chrome://crashes.

BUG=615739

Change-Id: Ic0dce75db63099715145a63cac82316494a87b12
Reviewed-on: https://chromium-review.googlesource.com/c/1373841Reviewed-by: Tommy Li <tommycli@chromium.org>
Commit-Queue: Julian Pastarmov <pastarmovj@chromium.org>
Cr-Commit-Position: refs/heads/master@{#616047}

chrome/app/generated_resources.grd

@@ -4670,14 +4670,6 @@ Keep your key file in a safe place. You will need it to create new versions of y
         </message>
       </if>
 
-      <!-- chrome://flash strings -->
-      <message name="IDS_FLASH_LOADING_MESSAGE" desc="Shown while loading until full list of modules is retrieved">
-      Loading...
-      </message>
-      <message name="IDS_FLASH_TITLE_MESSAGE" desc="Shown while loading until full list of modules is retrieved. 'Flash' is the name of a plugin and should not be translated.">
-      About Flash
-      </message>
-
       <!-- NaCl plugin strings -->
       <message name="IDS_NACL_APP_MISSING_ARCH_MESSAGE" desc="Shown if a Native Client app does not support the current architecture">
         This page uses a Native Client app that doesn't work on your computer.

chrome/browser/ui/BUILD.gn

@@ -3435,8 +3435,6 @@ jumbo_split_static_library("ui") {
     sources += [
       "hung_plugin_tab_helper.cc",
       "hung_plugin_tab_helper.h",
-      "webui/flash_ui.cc",
-      "webui/flash_ui.h",
     ]
     deps += [ "//ppapi/proxy:ipc" ]
   }

chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc

@@ -31,7 +31,6 @@
 #include "chrome/browser/ui/webui/download_internals/download_internals_ui.h"
 #include "chrome/browser/ui/webui/engagement/site_engagement_ui.h"
 #include "chrome/browser/ui/webui/flags_ui.h"
-#include "chrome/browser/ui/webui/flash_ui.h"
 #include "chrome/browser/ui/webui/gcm_internals_ui.h"
 #include "chrome/browser/ui/webui/hats/hats_ui.h"
 #include "chrome/browser/ui/webui/identity_internals_ui.h"
@@ -603,10 +602,6 @@ WebUIFactoryFunction GetWebUIFactoryFunction(WebUI* web_ui,
   if (url.host_piece() == chrome::kChromeUIExtensionsFrameHost)
     return &NewWebUI<extensions::ExtensionsUI>;
 #endif
-#if BUILDFLAG(ENABLE_PLUGINS)
-  if (url.host_piece() == chrome::kChromeUIFlashHost)
-    return &NewWebUI<FlashUI>;
-#endif
 #if BUILDFLAG(ENABLE_PRINT_PREVIEW)
   if (url.host_piece() == chrome::kChromeUIPrintHost &&
       !profile->GetPrefs()->GetBoolean(prefs::kPrintPreviewDisabled)) {
@@ -861,10 +856,6 @@ base::RefCountedMemory* ChromeWebUIControllerFactory::GetFaviconResourceBytes(
   if (page_url.host_piece() == chrome::kChromeUIBookmarksHost)
     return MdBookmarksUI::GetFaviconResourceBytes(scale_factor);
 
-  // Flash is not available on android.
-  if (page_url.host_piece() == chrome::kChromeUIFlashHost)
-    return FlashUI::GetFaviconResourceBytes(scale_factor);
-
   // Android uses the native download manager.
   if (page_url.host_piece() == chrome::kChromeUIDownloadsHost)
     return MdDownloadsUI::GetFaviconResourceBytes(scale_factor);

chrome/browser/ui/webui/flash_ui.h

-// Copyright (c) 2012 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.
-
-#ifndef CHROME_BROWSER_UI_WEBUI_FLASH_UI_H_
-#define CHROME_BROWSER_UI_WEBUI_FLASH_UI_H_
-
-#include "base/macros.h"
-#include "content/public/browser/web_ui_controller.h"
-#include "ui/base/layout.h"
-
-namespace base {
-class RefCountedMemory;
-}
-
-// The Web UI handler for about:flash.
-class FlashUI : public content::WebUIController {
- public:
-  explicit FlashUI(content::WebUI* web_ui);
-
-  static base::RefCountedMemory* GetFaviconResourceBytes(
-      ui::ScaleFactor scale_factor);
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(FlashUI);
-};
-
-#endif  // CHROME_BROWSER_UI_WEBUI_FLASH_UI_H_

chrome/common/webui_url_constants.cc

@@ -73,7 +73,6 @@ const char kChromeUIFaviconHost[] = "favicon";
 const char kChromeUIFaviconURL[] = "chrome://favicon/";
 const char kChromeUIFlagsHost[] = "flags";
 const char kChromeUIFlagsURL[] = "chrome://flags/";
-const char kChromeUIFlashHost[] = "flash";
 const char kChromeUIGCMInternalsHost[] = "gcm-internals";
 const char kChromeUIHangUIHost[] = "uithreadhang";
 const char kChromeUIHelpHost[] = "help";
@@ -386,7 +385,6 @@ const char* const kChromeHostURLs[] = {
 #endif
     kChromeUIBookmarksHost,
     kChromeUIDownloadsHost,
-    kChromeUIFlashHost,
     kChromeUIHelpHost,
     kChromeUIInspectHost,
     kChromeUISettingsHost,

chrome/common/webui_url_constants.h

@@ -78,7 +78,6 @@ extern const char kChromeUIFaviconHost[];
 extern const char kChromeUIFaviconURL[];
 extern const char kChromeUIFlagsHost[];
 extern const char kChromeUIFlagsURL[];
-extern const char kChromeUIFlashHost[];
 extern const char kChromeUIGCMInternalsHost[];
 extern const char kChromeUIHangUIHost[];
 extern const char kChromeUIHelpHost[];