[HBD] Remove the "Run all Flash in Allow mode" feature.

We've already removed access to this feature from chrome://flags.

This just removes the now-dead implementing code.

Bug: 709550
Change-Id: I21cd2516874722525c2ddab4a2ab0840e46d38c4
Reviewed-on: https://chromium-review.googlesource.com/580363Reviewed-by: Bernhard Bauer <bauerb@chromium.org>
Commit-Queue: Tommy Li <tommycli@chromium.org>
Cr-Commit-Position: refs/heads/master@{#488683}

chrome/browser/plugins/plugin_info_message_filter.cc

@@ -387,8 +387,7 @@ void PluginInfoMessageFilter::Context::DecidePluginStatus(
 
   if (plugin_setting == CONTENT_SETTING_DETECT_IMPORTANT_CONTENT ||
       (plugin_setting == CONTENT_SETTING_ALLOW &&
-       PluginUtils::ShouldPreferHtmlOverPlugins(host_content_settings_map_) &&
-       !base::FeatureList::IsEnabled(features::kRunAllFlashInAllowMode))) {
+       PluginUtils::ShouldPreferHtmlOverPlugins(host_content_settings_map_))) {
     *status = ChromeViewHostMsg_GetPluginInfo_Status::kPlayImportantContent;
   } else if (plugin_setting == CONTENT_SETTING_BLOCK) {
     // For managed users with the ASK policy, we allow manually running plugins

chrome/common/chrome_features.cc

@@ -343,12 +343,6 @@ const base::Feature kRuntimeMemoryLeakDetector{
     "RuntimeMemoryLeakDetector", base::FEATURE_DISABLED_BY_DEFAULT};
 #endif  // defined(OS_CHROMEOS)
 
-#if BUILDFLAG(ENABLE_PLUGINS)
-// Disables Plugin Power Saver when Flash is in ALLOW mode.
-const base::Feature kRunAllFlashInAllowMode{"RunAllFlashInAllowMode",
-                                            base::FEATURE_DISABLED_BY_DEFAULT};
-#endif
-
 const base::Feature kSafeSearchUrlReporting{"SafeSearchUrlReporting",
                                             base::FEATURE_DISABLED_BY_DEFAULT};
 

chrome/common/chrome_features.h

@@ -175,10 +175,6 @@ extern const base::Feature kPushMessagingBackgroundMode;
 extern const base::Feature kRuntimeMemoryLeakDetector;
 #endif  // defined(OS_CHROMEOS)
 
-#if BUILDFLAG(ENABLE_PLUGINS)
-extern const base::Feature kRunAllFlashInAllowMode;
-#endif
-
 extern const base::Feature kSafeSearchUrlReporting;
 
 extern const base::Feature kSimplifiedFullscreenUI;