Initialize FontFamilyNames also on Platform.

This is needed because PPAPI uses Platform without Core, so font names
aren't initialized properly there.

Bug: 742311
Change-Id: Ia0c89ffa9391759b54a73ec0d020ff437343e7a3
Reviewed-on: https://chromium-review.googlesource.com/570661Reviewed-by: Justin Novosad <junov@chromium.org>
Commit-Queue: Fernando Serboncini <fserb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#486488}

third_party/WebKit/Source/build/scripts/templates/MakeNames.cpp.tmpl

@@ -19,6 +19,10 @@ const AtomicString& {{entry|symbol}} = reinterpret_cast<AtomicString*>(&{{suffix
 {% endfor %}
 
 void init{{suffix}}() {
+  static bool isLoaded = false;
+  if (isLoaded) return;
+  isLoaded = true;
+
   struct NameEntry {
     const char* name;
     unsigned hash;

third_party/WebKit/Source/platform/exported/Platform.cpp

@@ -34,6 +34,7 @@
 
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/trace_event/memory_dump_manager.h"
+#include "platform/FontFamilyNames.h"
 #include "platform/Histogram.h"
 #include "platform/Language.h"
 #include "platform/MemoryCoordinator.h"
@@ -123,6 +124,11 @@ void Platform::Initialize(Platform* platform) {
         base::ThreadTaskRunnerHandle::Get());
 
   ThreadState::AttachMainThread();
+
+  // FontFamilyNames are used by platform/fonts and are initialized by core.
+  // In case core is not available (like on PPAPI plugins), we need to init
+  // them here.
+  FontFamilyNames::init();
   InitializePlatformLanguage();
 
   // TODO(ssid): remove this check after fixing crbug.com/486782.