Plugin Power Saver: Add comprehensive browser tests.

content/renderer/pepper/plugin_power_saver_helper.cc

Index: content/renderer/pepper/plugin_power_saver_helper.cc
diff --git a/content/renderer/pepper/plugin_power_saver_helper.cc b/content/renderer/pepper/plugin_power_saver_helper.cc
index 2891980fe7f49c4afeeeaf95401667698a6f4155..be63331681d127f2e57ea68aa853ea5f2a721583 100644
--- a/content/renderer/pepper/plugin_power_saver_helper.cc
+++ b/content/renderer/pepper/plugin_power_saver_helper.cc
@@ -9,6 +9,8 @@
 #include "content/common/frame_messages.h"
 #include "content/public/common/content_constants.h"
 #include "content/public/renderer/render_frame.h"
+#include "content/public/test/ppapi_test_utils.h"
+#include "ppapi/shared_impl/ppapi_constants.h"
 #include "third_party/WebKit/public/web/WebDocument.h"
 #include "third_party/WebKit/public/web/WebLocalFrame.h"
 #include "third_party/WebKit/public/web/WebPluginParams.h"
@@ -121,8 +123,11 @@ bool PluginPowerSaverHelper::ShouldThrottleContent(
     *cross_origin_main_content = false;
 
   // This feature has only been tested throughly with Flash thus far.
-  if (plugin_module_name != content::kFlashPluginName)
+  // It is also enabled for the PPAPI test library for browser tests.
+  if (plugin_module_name != content::kFlashPluginName &&
+      plugin_module_name != ppapi::kPpapiTestLibraryName) {
     return false;
+  }
 
   if (width <= 0 || height <= 0)
     return false;