Set the user gesture when executing script.

webkit/plugins/ppapi/ppapi_plugin_instance.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "webkit/plugins/ppapi/ppapi_plugin_instance.h"
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/memory/linked_ptr.h"
@@ skipping 1826 matching lines @@
   np_script.UTF8Length = script_string->value().length();
 
   // Get the current frame to pass to the evaluate function.
   WebFrame* frame = container_->element().document().frame();
   if (!frame) {
     try_catch.SetException("No frame to execute script in.");
     return PP_MakeUndefined();
   }
 
   NPVariant result;
-  bool ok = WebBindings::evaluate(NULL, frame->windowObject(), &np_script,
-                                  &result);
+  bool ok = false;
+  if (IsProcessingUserGesture()) {
+    WebKit::WebScopedUserGesture user_gesture;
+    ok = WebBindings::evaluate(NULL, frame->windowObject(), &np_script,
+                               &result);
+  } else {
+    ok = WebBindings::evaluate(NULL, frame->windowObject(), &np_script,
+                               &result);
+  }
   if (!ok) {
     // TryCatch doesn't catch the exceptions properly. Since this is only for
     // a trusted API, just set to a general exception message.
     try_catch.SetException("Exception caught");
     WebBindings::releaseVariantValue(&result);
     return PP_MakeUndefined();
   }
 
   PP_Var ret = NPVariantToPPVar(this, &result);
   WebBindings::releaseVariantValue(&result);
@@ skipping 389 matching lines @@
   screen_size_for_fullscreen_ = gfx::Size();
   WebElement element = container_->element();
   element.setAttribute(WebString::fromUTF8(kWidth), width_before_fullscreen_);
   element.setAttribute(WebString::fromUTF8(kHeight), height_before_fullscreen_);
   element.setAttribute(WebString::fromUTF8(kBorder), border_before_fullscreen_);
   element.setAttribute(WebString::fromUTF8(kStyle), style_before_fullscreen_);
 }
 
 }  // namespace ppapi
 }  // namespace webkit