YUV software decode path stride fixes.

cc/video_layer_impl.cc

Index: cc/video_layer_impl.cc
diff --git a/cc/video_layer_impl.cc b/cc/video_layer_impl.cc
index 9930a0c4eac8bd4b7e0dac633d74d82951699d99..cd7f8c2e186721732f2a857e137d55c0ec41bde0 100644
--- a/cc/video_layer_impl.cc
+++ b/cc/video_layer_impl.cc
@@ -372,8 +372,9 @@ bool VideoLayerImpl::copyPlaneData(ResourceProvider* resourceProvider)
         // Only non-FormatNativeTexture planes should need upload.
         DCHECK_EQ(plane.format, GL_LUMINANCE);
         const uint8_t* softwarePlanePixels = m_frame->data(planeIndex);
-        gfx::Rect planeRect(gfx::Point(), plane.size);
-        resourceProvider->setPixels(plane.resourceId, softwarePlanePixels, planeRect, planeRect, gfx::Vector2d());
+        gfx::Rect imageRect(0, 0, m_frame->stride(planeIndex), plane.size.height());
+        gfx::Rect sourceRect(gfx::Point(), plane.size);
+        resourceProvider->setPixels(plane.resourceId, softwarePlanePixels, imageRect, sourceRect, gfx::Vector2d());
     }
     return true;
 }