Delete IsMutable and IsExclusive methods.

webrtc/common_video/i420_buffer_pool_unittest.cc

Index: webrtc/common_video/i420_buffer_pool_unittest.cc
diff --git a/webrtc/common_video/i420_buffer_pool_unittest.cc b/webrtc/common_video/i420_buffer_pool_unittest.cc
index 2110066a928d7e10ce8171bf78d8c6e76d55232b..3e795dbdc4b3f021ca77ef3122b570bb843a5172 100644
--- a/webrtc/common_video/i420_buffer_pool_unittest.cc
+++ b/webrtc/common_video/i420_buffer_pool_unittest.cc
@@ -51,20 +51,12 @@ TEST(TestI420BufferPool, FailToReuse) {
   EXPECT_NE(v_ptr, buffer->DataV());
 }
 
-TEST(TestI420BufferPool, ExclusiveOwner) {
-  // Check that created buffers are exclusive so that they can be written to.
-  I420BufferPool pool;
-  rtc::scoped_refptr<VideoFrameBuffer> buffer = pool.CreateBuffer(16, 16);
-  EXPECT_TRUE(buffer->IsMutable());
-}
-
 TEST(TestI420BufferPool, FrameValidAfterPoolDestruction) {
   rtc::scoped_refptr<VideoFrameBuffer> buffer;
   {
     I420BufferPool pool;
     buffer = pool.CreateBuffer(16, 16);
   }
-  EXPECT_TRUE(buffer->IsMutable());
   EXPECT_EQ(16, buffer->width());
   EXPECT_EQ(16, buffer->height());
   // Try to trigger use-after-free errors by writing to y-plane.