gpu: Add missing ScopedRenderTo

gpu/command_buffer/service/gles2_cmd_decoder.cc

Index: gpu/command_buffer/service/gles2_cmd_decoder.cc
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder.cc b/gpu/command_buffer/service/gles2_cmd_decoder.cc
index 0e99bb9b030b5920a4fa0b81d7be50bdb28f3360..47185c2de1967c7042a0f6bb917486ca5bd0d1f4 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.cc
@@ -4367,6 +4367,7 @@ void GLES2DecoderImpl::DoDiscardFramebufferEXT(GLenum target,
     translated_attachments[i] = attachment;
   }
 
+  ScopedRenderTo do_render(framebuffer);
   glDiscardFramebufferEXT(target, numAttachments, translated_attachments.get());
 }
 
@@ -5114,6 +5115,7 @@ error::Error GLES2DecoderImpl::DoClear(GLbitfield mask) {
   DCHECK(!ShouldDeferDraws());
   if (CheckBoundFramebuffersValid("glClear")) {
     ApplyDirtyState();
+    ScopedRenderTo do_render(framebuffer_state_.bound_draw_framebuffer.get());
     glClear(mask);
   }
   return error::kNoError;
@@ -5415,6 +5417,7 @@ void GLES2DecoderImpl::DoBlitFramebufferCHROMIUM(
   }
 
   state_.SetDeviceCapabilityState(GL_SCISSOR_TEST, false);
+  ScopedRenderTo do_render(framebuffer_state_.bound_draw_framebuffer.get());
   BlitFramebufferHelper(
       srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1, dstY1, mask, filter);
   state_.SetDeviceCapabilityState(GL_SCISSOR_TEST,