From 3c366b33751752790db5a550ad26adaf9d46d313 Mon Sep 17 00:00:00 2001
From: tommycli <tommycli@chromium.org>
Date: Mon, 6 Oct 2014 16:05:46 -0700
Subject: [PATCH] Plugin Power Saver: Add flag to experiment behind.

This adds a flag we can experiment behind and begin the implementation parts we know how to do.

Design doc: http://goo.gl/iDix3p

BUG=403800

Review URL: https://codereview.chromium.org/617073002

Cr-Commit-Position: refs/heads/master@{#298304}
---
 chrome/app/generated_resources.grd                        | 6 ++++++
 chrome/browser/about_flags.cc                             | 9 +++++++++
 content/browser/renderer_host/render_process_host_impl.cc | 1 +
 content/public/common/content_switches.cc                 | 3 +++
 content/public/common/content_switches.h                  | 1 +
 tools/metrics/histograms/histograms.xml                   | 1 +
 6 files changed, 21 insertions(+)

diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index 89d542a768d2..a95a7c3c8bba 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -6079,6 +6079,12 @@ Keep your key file in a safe place. You will need it to create new versions of y
       <message name="IDS_FLAGS_ALLOW_NACL_SOCKET_API_DESCRIPTION" desc="Description for the NaCl Socket API feature.">
         Allows applications to use NaCl Socket API. Use only to test NaCl plugins.
       </message>
+      <message name="IDS_FLAGS_ENABLE_PLUGIN_POWER_SAVER_NAME" desc="Name for the Plugin Power Saver feature.">
+        Enable Plugin Power Saver.
+      </message>
+      <message name="IDS_FLAGS_ENABLE_PLUGIN_POWER_SAVER_DESCRIPTION" desc="Description for the Plugin Power Saver feature.">
+        Enables experimental power saver mode for peripheral plugin content.
+      </message>
       <message name="IDS_FLAGS_ENABLE_PINCH_SCALE_NAME" desc="Name of the flag to turn on experiental pinch to scale.">
         Enable pinch scale.
       </message>
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index 4594ea585ddb..45993cf0097a 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -1943,6 +1943,15 @@ const Experiment kExperiments[] = {
     kOsAll,
     SINGLE_VALUE_TYPE(switches::kEnableCredentialManagerAPI)
   },
+#if defined(ENABLE_PLUGINS)
+  {
+    "enable-plugin-power-saver",
+    IDS_FLAGS_ENABLE_PLUGIN_POWER_SAVER_NAME,
+    IDS_FLAGS_ENABLE_PLUGIN_POWER_SAVER_DESCRIPTION,
+    kOsDesktop,
+    SINGLE_VALUE_TYPE(switches::kEnablePluginPowerSaver)
+  },
+#endif
 
   // NOTE: Adding new command-line switches requires adding corresponding
   // entries to enum "LoginCustomFlags" in histograms.xml. See note in
diff --git a/content/browser/renderer_host/render_process_host_impl.cc b/content/browser/renderer_host/render_process_host_impl.cc
index 8e778b6687f3..76a77177c8e4 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -1149,6 +1149,7 @@ void RenderProcessHostImpl::PropagateBrowserCommandLineToRenderer(
     switches::kEnableOverlayScrollbar,
     switches::kEnableOverscrollNotifications,
     switches::kEnablePinch,
+    switches::kEnablePluginPowerSaver,
     switches::kEnablePreciseMemoryInfo,
     switches::kEnableRendererMojoChannel,
     switches::kEnableSeccompFilterSandbox,
diff --git a/content/public/common/content_switches.cc b/content/public/common/content_switches.cc
index 940adf9b84b3..d9be18254bc8 100644
--- a/content/public/common/content_switches.cc
+++ b/content/public/common/content_switches.cc
@@ -399,6 +399,9 @@ const char kEnableOverscrollNotifications[] = "enable-overscroll-notifications";
 // Enables compositor-accelerated touch-screen pinch gestures.
 const char kEnablePinch[]                   = "enable-pinch";
 
+// Enables the plugin power saver feature.
+const char kEnablePluginPowerSaver[]        = "enable-plugin-power-saver";
+
 // Make the values returned to window.performance.memory more granular and more
 // up to date in shared worker. Without this flag, the memory information is
 // still available, but it is bucketized and updated less frequently. This flag
diff --git a/content/public/common/content_switches.h b/content/public/common/content_switches.h
index 037dd2c4d195..526301578a8d 100644
--- a/content/public/common/content_switches.h
+++ b/content/public/common/content_switches.h
@@ -121,6 +121,7 @@ CONTENT_EXPORT extern const char kEnableOneCopy[];
 CONTENT_EXPORT extern const char kEnableOverlayFullscreenVideo[];
 CONTENT_EXPORT extern const char kEnableOverscrollNotifications[];
 CONTENT_EXPORT extern const char kEnablePinch[];
+CONTENT_EXPORT extern const char kEnablePluginPowerSaver[];
 CONTENT_EXPORT extern const char kEnablePreciseMemoryInfo[];
 CONTENT_EXPORT extern const char kEnableRegionBasedColumns[];
 CONTENT_EXPORT extern const char kEnableRendererMojoChannel[];
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index 01e6809e03ca..8fab12d93b81 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -45731,6 +45731,7 @@ To add a new entry, add it with any value and run test to compute valid value.
       label="disable-gesture-requirement-for-media-playback"/>
   <int value="458410433" label="disable-views-rect-based-targeting"/>
   <int value="494733611" label="disable-drop-sync-credential"/>
+  <int value="535976218" label="enable-plugin-power-saver"/>
   <int value="546710806" label="disable-easy-signin"/>
   <int value="550378029" label="reset-app-list-install-state"/>
   <int value="567368307" label="enable-experimental-canvas-features"/>
-- 
2.11.4.GIT