WIP POC blob transport over mojo

content/renderer/renderer_blink_platform_impl.cc

Index: content/renderer/renderer_blink_platform_impl.cc
diff --git a/content/renderer/renderer_blink_platform_impl.cc b/content/renderer/renderer_blink_platform_impl.cc
index a54028632b2d5b37579b72b193a24f47ea242d67..dc8e80e3821478fac41908a3c137f91fc7f8fd53 100644
--- a/content/renderer/renderer_blink_platform_impl.cc
+++ b/content/renderer/renderer_blink_platform_impl.cc
@@ -25,6 +25,7 @@
 #include "build/build_config.h"
 #include "components/url_formatter/url_formatter.h"
 #include "content/child/blob_storage/webblobregistry_impl.h"
+#include "content/child/child_process.h"
 #include "content/child/database_util.h"
 #include "content/child/file_info_util.h"
 #include "content/child/fileapi/webfilesystem_impl.h"
@@ -464,6 +465,28 @@ void RendererBlinkPlatformImpl::SuddenTerminationChanged(bool enabled) {
     thread->Send(new RenderProcessHostMsg_SuddenTerminationChanged(enabled));
 }
 
+void RendererBlinkPlatformImpl::IncProcessRefCount() {
+  if (!main_thread_->IsCurrentThread()) {
+    main_thread_->GetSingleThreadTaskRunner()->PostTask(
+        FROM_HERE, base::Bind(&RendererBlinkPlatformImpl::IncProcessRefCount,
+                              base::Unretained(this)));
+    return;
+  }
+  SuddenTerminationChanged(false);
+  ChildProcess::current()->AddRefProcess();
+}
+
+void RendererBlinkPlatformImpl::DecProcessRefCount() {
+  if (!main_thread_->IsCurrentThread()) {
+    main_thread_->GetSingleThreadTaskRunner()->PostTask(
+        FROM_HERE, base::Bind(&RendererBlinkPlatformImpl::DecProcessRefCount,
+                              base::Unretained(this)));
+    return;
+  }
+  SuddenTerminationChanged(true);
+  ChildProcess::current()->ReleaseProcess();
+}
+
 std::unique_ptr<WebStorageNamespace>
 RendererBlinkPlatformImpl::CreateLocalStorageNamespace() {
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(