Fix a typo in YuvConveter RGB shader code.

TBR=magjed@webrtc.org

Bug: None
Change-Id: Ia2594f6191510cb971f435ca9c27418cce929617
Reviewed-on: https://webrtc-review.googlesource.com/12920
Reviewed-by: Sami Kalliomäki <sakal@webrtc.org>
Commit-Queue: Sami Kalliomäki <sakal@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20332}
diff --git a/sdk/android/api/org/webrtc/YuvConverter.java b/sdk/android/api/org/webrtc/YuvConverter.java
index 99e75bd..268e4d2 100644
--- a/sdk/android/api/org/webrtc/YuvConverter.java
+++ b/sdk/android/api/org/webrtc/YuvConverter.java
@@ -85,7 +85,7 @@
         "precision mediump float;\n"
       + "varying vec2 interp_tc;\n"
       + "\n"
-      + "uniform sample2D tex;\n"
+      + "uniform sampler2D tex;\n"
       // Difference in texture coordinate corresponding to one
       // sub-pixel in the x direction.
       + "uniform vec2 xUnit;\n"