Fix mime type mappings when the unified media pipeline is enabled.

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index 0fec9edb263264ae428ee42d3cf612d28cd6b04f..12e31bd84c93b5922bd24fa8094c46a8ead06434 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -172,6 +172,7 @@
 #include "content/renderer/android/synchronous_compositor_filter.h"
 #include "content/renderer/media/android/renderer_demuxer_android.h"
 #include "content/renderer/media/android/stream_texture_factory_impl.h"
+#include "media/base/android/media_codec_util.h"
 #endif
 
 #if defined(OS_MACOSX)
@@ -809,6 +810,13 @@ void RenderThreadImpl::Init() {
   // been initialized by the Zygote before this instance became a Renderer.
   media::InitializeMediaLibrary();
 
+#if defined(OS_ANDROID)
+  if (!command_line.HasSwitch(switches::kDisableAcceleratedVideoDecode) &&
+      media::MediaCodecUtil::IsMediaCodecAvailable()) {
+    media::EnablePlatformDecoderSupport();
+  }
+#endif
+
   memory_pressure_listener_.reset(new base::MemoryPressureListener(
       base::Bind(&RenderThreadImpl::OnMemoryPressure, base::Unretained(this))));