Ensure we don't use SwiftShader to present Flash Fullscreen.

content/renderer/render_widget_fullscreen_pepper.cc

Index: content/renderer/render_widget_fullscreen_pepper.cc
diff --git a/content/renderer/render_widget_fullscreen_pepper.cc b/content/renderer/render_widget_fullscreen_pepper.cc
index ba828b7016d2d2f7c173e2a46e777762f1c8304d..6fb454af6c24f1313dbb0349888aeb8ff9e22825 100644
--- a/content/renderer/render_widget_fullscreen_pepper.cc
+++ b/content/renderer/render_widget_fullscreen_pepper.cc
@@ -5,9 +5,11 @@
 #include "content/renderer/render_widget_fullscreen_pepper.h"
 
 #include "base/bind.h"
+#include "base/command_line.h"
 #include "base/message_loop.h"
 #include "content/common/gpu/client/gpu_channel_host.h"
 #include "content/common/view_messages.h"
+#include "content/public/common/content_switches.h"
 #include "content/renderer/pepper/pepper_platform_context_3d_impl.h"
 #include "content/renderer/render_thread_impl.h"
 #include "gpu/command_buffer/client/gles2_implementation.h"
@@ -432,6 +434,9 @@ bool RenderWidgetFullscreenPepper::SupportsAsynchronousSwapBuffers() {
 
 void RenderWidgetFullscreenPepper::CreateContext() {
   DCHECK(!context_);
+  CommandLine* command_line = CommandLine::ForCurrentProcess();
+  if (command_line->HasSwitch(switches::kDisableFlashFullscreen3d))
+    return;
   WebKit::WebGraphicsContext3D::Attributes attributes;
   attributes.depth = false;
   attributes.stencil = false;