Implement skia sandbox callback

chrome/renderer/print_web_view_helper.cc

Index: chrome/renderer/print_web_view_helper.cc
diff --git a/chrome/renderer/print_web_view_helper.cc b/chrome/renderer/print_web_view_helper.cc
index 1b4008a97bcaa5d503a430d14b999bc5e1d91754..cfa6e62d642020b1dd86edf8f06c0f78f77db959 100644
--- a/chrome/renderer/print_web_view_helper.cc
+++ b/chrome/renderer/print_web_view_helper.cc
@@ -45,6 +45,9 @@
 #include "skia/ext/vector_canvas.h"
 #include "skia/ext/vector_platform_device_skia.h"
 #include "third_party/skia/include/core/SkTypeface.h"
+#if defined (OS_WIN)
+#include "content/common/child_process_messages.h"
+#endif
 #elif defined(OS_MACOSX)
 #include <CoreGraphics/CGContext.h>
 
@@ -442,9 +445,20 @@ PrintWebViewHelper::PrintWebViewHelper(content::RenderView* render_view)
       is_print_ready_metafile_sent_(false),
       user_cancelled_scripted_print_count_(0),
       notify_browser_of_print_failure_(true) {
+#if defined(OS_WIN) && defined(USE_SKIA)
+  if (!g_SandboxSupport) {
+    g_SandboxSupport = this;
+  }
+#endif
 }
 
-PrintWebViewHelper::~PrintWebViewHelper() {}
+PrintWebViewHelper::~PrintWebViewHelper() {
+#if defined(OS_WIN) && defined(USE_SKIA)
+  if (g_SandboxSupport == this) {
+    g_SandboxSupport = NULL;
+  }
+#endif
+}
 
 // Prints |frame| which called window.print().
 void PrintWebViewHelper::PrintPage(WebKit::WebFrame* frame) {
@@ -1569,3 +1583,10 @@ void PrintWebViewHelper::PrintPreviewContext::ClearContext() {
   pages_to_render_.clear();
   error_ = PREVIEW_ERROR_NONE;
 }
+
+#if defined(OS_WIN) && defined(USE_SKIA)
+void PrintWebViewHelper::EnsureFontLoad(LOGFONT logfont) {
+  // This is a synchronized IPC message, will block caller thread.
+  Send(new ChildProcessHostMsg_PreCacheFont(logfont));
+}
+#endif