win: Fix remaining plugin warnings in ash, device, printing, sandbox.

printing/emf_win.cc

Index: printing/emf_win.cc
diff --git a/printing/emf_win.cc b/printing/emf_win.cc
index 030d5203f402f95074c7f9cffd823cf52e00e77c..2afa1dde1abd2b0a97c64375ca17ab4851f2bdf1 100644
--- a/printing/emf_win.cc
+++ b/printing/emf_win.cc
@@ -246,6 +246,14 @@ gfx::Rect Emf::GetPageBounds(unsigned int page_number) const {
                    header.rclBounds.bottom - header.rclBounds.top + 1);
 }
 
+unsigned int Emf::GetPageCount() const {
+  return 1;
+}
+
+HDC Emf::context() const {
+  return hdc_;
+}
+
 uint32 Emf::GetDataSize() const {
   DCHECK(emf_ && !hdc_);
   return GetEnhMetaFileBits(emf_, 0, NULL);
@@ -472,6 +480,9 @@ Emf::Enumerator::Enumerator(const Emf& emf, HDC context, const RECT* rect) {
   DCHECK_EQ(context_.hdc, context);
 }
 
+Emf::Enumerator::~Enumerator() {
+}
+
 Emf::Enumerator::const_iterator Emf::Enumerator::begin() const {
   return items_.begin();
 }