Clarify/fix fullscreen semantics, and add GetScreenSize

chrome/renderer/pepper_plugin_delegate_impl.cc

Index: chrome/renderer/pepper_plugin_delegate_impl.cc
diff --git a/chrome/renderer/pepper_plugin_delegate_impl.cc b/chrome/renderer/pepper_plugin_delegate_impl.cc
index 8d11b2fe90dac1070be7bb744c5f7f7ea924510c..469bac6f7dc0ac0678c6ef2f2a19e1759cb006fc 100644
--- a/chrome/renderer/pepper_plugin_delegate_impl.cc
+++ b/chrome/renderer/pepper_plugin_delegate_impl.cc
@@ -40,6 +40,7 @@
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebFileChooserCompletion.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebFileChooserParams.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebPluginContainer.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebScreenInfo.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/gfx/size.h"
@@ -867,6 +868,11 @@ PepperPluginDelegateImpl::CreateFullscreenContainer(
   return render_view_->CreatePepperFullscreenContainer(instance);
 }
 
+gfx::Size PepperPluginDelegateImpl::GetScreenSize() {
+  WebKit::WebScreenInfo info = render_view_->screenInfo();
+  return gfx::Size(info.rect.width, info.rect.height);
+}
+
 std::string PepperPluginDelegateImpl::GetDefaultEncoding() {
   // TODO(brettw) bug 56615: Somehow get the preference for the default
   // encoding here rather than using the global default for the UI language.