Add allocator shim test to ffmpeg test suite.

media/ffmpeg/ffmpeg_common_unittest.cc

Index: media/ffmpeg/ffmpeg_common_unittest.cc
diff --git a/media/ffmpeg/ffmpeg_common_unittest.cc b/media/ffmpeg/ffmpeg_common_unittest.cc
index 0d9bdc9980f9aa918c5516802efb24b490d30c3d..ff0730732f9ced51c69398c1812ea5bbb5342ba0 100644
--- a/media/ffmpeg/ffmpeg_common_unittest.cc
+++ b/media/ffmpeg/ffmpeg_common_unittest.cc
@@ -3,6 +3,7 @@
 // found in the LICENSE file.
 
 #include "base/logging.h"
+#include "base/memory/scoped_ptr.h"
 #include "media/ffmpeg/ffmpeg_common.h"
 #include "media/filters/ffmpeg_glue.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -88,6 +89,17 @@ TEST_F(FFmpegCommonTest, UTCDateToTime_Valid) {
   EXPECT_EQ(0, exploded.millisecond);
 }
 
+#if defined(ALLOCATOR_SHIM) && defined(GTEST_HAS_DEATH_TEST)
+TEST_F(FFmpegCommonTest, WinAllocatorShimDeathTest) {
+  scoped_ptr<char, base::FreeDeleter> ptr;
+  // INT_MAX - 128 is carefully chosen to be below the default limit for
+  // ffmpeg allocations, but above the maximum allowed limit by the allocator
+  // shim, so we can be certain the code is being hit.
+  EXPECT_DEATH(ptr.reset(static_cast<char*>(av_malloc(INT_MAX - 128))), "");
+  ASSERT_TRUE(!ptr);
+}
+#endif
+
 TEST_F(FFmpegCommonTest, UTCDateToTime_Invalid) {
   const char* invalid_date_strings[] = {
     "",