Update from https://crrev.com/314320

cc/output/gl_renderer.cc

Index: cc/output/gl_renderer.cc
diff --git a/cc/output/gl_renderer.cc b/cc/output/gl_renderer.cc
index e40a4fc44fff24906cbb6c4a71f2e9385cf7cdc5..5a15efa89fd9d3587b53d491c9b175b592bb7f34 100644
--- a/cc/output/gl_renderer.cc
+++ b/cc/output/gl_renderer.cc
@@ -10,8 +10,8 @@
 #include <string>
 #include <vector>
 
-#include "base/debug/trace_event.h"
 #include "base/logging.h"
+#include "base/trace_event/trace_event.h"
 #include "cc/base/math_util.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/compositor_frame_metadata.h"
@@ -1831,6 +1831,7 @@ void GLRenderer::DrawYUVVideoQuad(const DrawingFrame* frame,
   int matrix_location = -1;
   int tex_scale_location = -1;
   int tex_offset_location = -1;
+  int clamp_rect_location = -1;
   int y_texture_location = -1;
   int u_texture_location = -1;
   int v_texture_location = -1;
@@ -1851,6 +1852,7 @@ void GLRenderer::DrawYUVVideoQuad(const DrawingFrame* frame,
     a_texture_location = program->fragment_shader().a_texture_location();
     yuv_matrix_location = program->fragment_shader().yuv_matrix_location();
     yuv_adj_location = program->fragment_shader().yuv_adj_location();
+    clamp_rect_location = program->fragment_shader().clamp_rect_location();
     alpha_location = program->fragment_shader().alpha_location();
   } else {
     const VideoYUVProgram* program = GetVideoYUVProgram(tex_coord_precision);
@@ -1864,6 +1866,7 @@ void GLRenderer::DrawYUVVideoQuad(const DrawingFrame* frame,
     v_texture_location = program->fragment_shader().v_texture_location();
     yuv_matrix_location = program->fragment_shader().yuv_matrix_location();
     yuv_adj_location = program->fragment_shader().yuv_adj_location();
+    clamp_rect_location = program->fragment_shader().clamp_rect_location();
     alpha_location = program->fragment_shader().alpha_location();
   }
 
@@ -1875,6 +1878,17 @@ void GLRenderer::DrawYUVVideoQuad(const DrawingFrame* frame,
       gl_->Uniform2f(tex_offset_location,
                      quad->tex_coord_rect.x(),
                      quad->tex_coord_rect.y()));
+  // Clamping to half a texel inside the tex coord rect prevents bilinear
+  // filtering from filtering outside the tex coord rect.
+  gfx::RectF clamp_rect(quad->tex_coord_rect);
+  // Special case: empty texture size implies no clamping.
+  if (!quad->tex_size.IsEmpty()) {
+    clamp_rect.Inset(0.5f / quad->tex_size.width(),
+                     0.5f / quad->tex_size.height());
+  }
+  GLC(gl_, gl_->Uniform4f(clamp_rect_location, clamp_rect.x(), clamp_rect.y(),
+                          clamp_rect.right(), clamp_rect.bottom()));
+
   GLC(gl_, gl_->Uniform1i(y_texture_location, 1));
   GLC(gl_, gl_->Uniform1i(u_texture_location, 2));
   GLC(gl_, gl_->Uniform1i(v_texture_location, 3));