Update a webview plugin's WebView's lifecycle immediately after resizing.

components/plugins/renderer/loadable_plugin_placeholder.cc

Index: components/plugins/renderer/loadable_plugin_placeholder.cc
diff --git a/components/plugins/renderer/loadable_plugin_placeholder.cc b/components/plugins/renderer/loadable_plugin_placeholder.cc
index f28c19638b980491014f7c72e410f0150bc2ad3b..b4fcb7ed110617dd310c2cccf55203b1fcfded10 100644
--- a/components/plugins/renderer/loadable_plugin_placeholder.cc
+++ b/components/plugins/renderer/loadable_plugin_placeholder.cc
@@ -35,11 +35,6 @@ using content::RenderThread;
 
 namespace plugins {
 
-// TODO(tommycli): After a size update, re-check the size after this delay, as
-// Blink can report incorrect sizes to plugins while the compositing state is
-// dirty. Chosen because it seems to work.
-const int kSizeChangeRecheckDelayMilliseconds = 100;

[chrishtr, 2016/03/04 05:22:09]

Strictly speaking, the change to this file has to be in the same CL as the other
one,
since it is not required to fix the referenced bug.

But timers like this are bad, especially since they introduce race conditions
that are very hard
to debug and reproduce.

-
 void LoadablePluginPlaceholder::BlockForPowerSaverPoster() {
   DCHECK(!is_blocked_for_power_saver_poster_);
   is_blocked_for_power_saver_poster_ = true;
@@ -200,16 +195,7 @@ void LoadablePluginPlaceholder::OnUnobscuredRectUpdate(
     return;
   }
 
-  if (!size_update_timer_.IsRunning()) {
-    // TODO(tommycli): We have to post a delayed task to recheck the size, as
-    // Blink can report wrong sizes for partially obscured plugins while the
-    // compositing state is dirty. https://crbug.com/343769
-    size_update_timer_.Start(
-        FROM_HERE,
-        base::TimeDelta::FromMilliseconds(kSizeChangeRecheckDelayMilliseconds),
-        base::Bind(&LoadablePluginPlaceholder::RecheckSizeAndMaybeUnthrottle,
-                   weak_factory_.GetWeakPtr()));
-  }
+  RecheckSizeAndMaybeUnthrottle();
 }
 
 void LoadablePluginPlaceholder::WasShown() {