Add existing Media histogram to histograms.xml.

Add Media.CodecImage.SurfaceTextureGLOwner.WaitTimeForFrame and
Media.CodecImage.ImageReaderGLOwner.WaitTimeForFrame to histograms.xml.
These were added in the source code by CL 561988 but was not added
to histograms.xml.

Bug: 849218
Change-Id: I417e19816398aad194e534379e4cbe3dca3e4383
Reviewed-on: https://chromium-review.googlesource.com/1093540Reviewed-by: Brian White <bcwhite@chromium.org>
Commit-Queue: vikas soni <vikassoni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567115}

tools/metrics/histograms/histograms.xml

@@ -38859,6 +38859,11 @@ uploading your change for review.
 </histogram>
 
 <histogram name="Media.AvdaCodecImage.WaitTimeForFrame" units="ms">
+  <obsolete>
+    Deprecated 06/2018. This has been renamed to
+    Media.CodecImage.SurfaceTextureGLOwner.WaitTimeForFrame and
+    Media.CodecImage.ImageReaderGLOwner.WaitTimeForFrame.
+  </obsolete>
   <owner>liberato@chromium.org</owner>
   <summary>
     Time spent waiting for a frame to become available in a Non Overlay after
@@ -38942,6 +38947,26 @@ uploading your change for review.
   </summary>
 </histogram>
 
+<histogram name="Media.CodecImage.ImageReaderGLOwner.WaitTimeForFrame"
+    units="ms">
+  <owner>vikassoni@chromium.org</owner>
+  <summary>
+    Time spent waiting for a frame to become available in a Non Overlay
+    (AImageReader mode) so that MediaCodec can render it. This time is recorded
+    before the frame is rendered.
+  </summary>
+</histogram>
+
+<histogram name="Media.CodecImage.SurfaceTextureGLOwner.WaitTimeForFrame"
+    units="ms">
+  <owner>liberato@chromium.org</owner>
+  <summary>
+    Time spent waiting for a frame to become available in a Non Overlay
+    (SurfaceTexture mode) so that MediaCodec can render it. This time is
+    recorded before the frame is rendered.
+  </summary>
+</histogram>
+
 <histogram name="Media.Controls.CTR" enum="MediaControlsCTREvent">
   <owner>mlamouri@chromium.org</owner>
   <owner>media-dev@chromium.org</owner>