media/gpu: format_utils: Log unsupported format.

Log unsupported BufferFormat and VideoPixelFormat to
facilitate debugging.

BUG=None
TEST=Noe

Change-Id: I3b38a5c5a3cff91464d30ada4c6a09485f576006
Reviewed-on: https://chromium-review.googlesource.com/c/1354739
Commit-Queue: Shuo-Peng Liao <deanliao@google.com>
Reviewed-by: Hirokazu Honda <hiroh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#612118}

media/gpu/BUILD.gn

@@ -357,6 +357,7 @@ source_set("common") {
     "//base",
     "//media",
     "//ui/gfx:buffer_types",
+    "//ui/gfx:memory_buffer",
     "//ui/gfx/geometry",
   ]
 }

media/gpu/format_utils.cc

@@ -4,6 +4,7 @@
 
 #include "media/gpu/format_utils.h"
 #include "base/logging.h"
+#include "ui/gfx/buffer_format_util.h"
 
 namespace media {
 
@@ -30,7 +31,8 @@ VideoPixelFormat GfxBufferFormatToVideoPixelFormat(gfx::BufferFormat format) {
       return PIXEL_FORMAT_NV12;
 
     default:
-      LOG(FATAL) << "Add more cases as needed";
+      LOG(FATAL) << "Unsupported BufferFormat: "
+                 << gfx::BufferFormatToString(format);
       return PIXEL_FORMAT_UNKNOWN;
   }
 }
@@ -51,7 +53,7 @@ gfx::BufferFormat VideoPixelFormatToGfxBufferFormat(
       return gfx::BufferFormat::YUV_420_BIPLANAR;
 
     default:
-      LOG(FATAL) << "Add more cases as needed";
+      LOG(FATAL) << "Unsupported VideoPixelFormat: " << pixel_format;
       return gfx::BufferFormat::BGRX_8888;
   }
 }