Switched power status helper to use "effectively fullscreen".

We'd like to know "is user watching video" vs "is user scrolling
around the page" when recording power.  So, we allow any
fullscreen-like experience to count, rather than just strictly
full-screening the media element.

While this is still not exact, it's much closer to what we want.

Bug: 1017787
Change-Id: Idb022eb10a9f5e51f0fdef58c3a11ab5e9f40849
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2070836Reviewed-by: Chrome Cunningham <chcunningham@chromium.org>
Commit-Queue: Frank Liberato <liberato@chromium.org>
Cr-Commit-Position: refs/heads/master@{#745261}

media/blink/webmediaplayer_impl.cc

@@ -58,6 +58,7 @@
 #include "mojo/public/cpp/bindings/pending_remote.h"
 #include "net/base/data_url.h"
 #include "third_party/blink/public/platform/web_encrypted_media_types.h"
+#include "third_party/blink/public/platform/web_fullscreen_video_status.h"
 #include "third_party/blink/public/platform/web_media_player_client.h"
 #include "third_party/blink/public/platform/web_media_player_encrypted_media_client.h"
 #include "third_party/blink/public/platform/web_media_player_source.h"
@@ -569,15 +570,9 @@ void WebMediaPlayerImpl::EnteredFullscreen() {
   // info before returning.
   if (!decoder_requires_restart_for_overlay_)
     MaybeSendOverlayInfoToDecoder();
-
-  if (power_status_helper_)
-    power_status_helper_->SetIsFullscreen(true);
 }
 
 void WebMediaPlayerImpl::ExitedFullscreen() {
-  if (power_status_helper_)
-    power_status_helper_->SetIsFullscreen(false);
-
   overlay_info_.is_fullscreen = false;
 
   // If we're in overlay mode, then exit it unless we're supposed to allow
@@ -598,6 +593,14 @@ void WebMediaPlayerImpl::BecameDominantVisibleContent(bool is_dominant) {
 void WebMediaPlayerImpl::SetIsEffectivelyFullscreen(
     blink::WebFullscreenVideoStatus fullscreen_video_status) {
   delegate_->SetIsEffectivelyFullscreen(delegate_id_, fullscreen_video_status);
+
+  if (power_status_helper_) {
+    // We don't care about pip, so anything that's "not fullscreen" is good
+    // enough for us.
+    power_status_helper_->SetIsFullscreen(
+        fullscreen_video_status !=
+        blink::WebFullscreenVideoStatus::kNotEffectivelyFullscreen);
+  }
 }
 
 void WebMediaPlayerImpl::OnHasNativeControlsChanged(bool has_native_controls) {