Added Tough Texture upload page set to smoothness benchmark.

tools/perf/page_sets/tough_texture_upload_cases/texture_upload_experiment.js

Index: tools/perf/page_sets/tough_texture_upload_cases/texture_upload_experiment.js
diff --git a/tools/perf/page_sets/tough_texture_upload_cases/texture_upload_experiment.js b/tools/perf/page_sets/tough_texture_upload_cases/texture_upload_experiment.js
new file mode 100644
index 0000000000000000000000000000000000000000..6284a978e0b431d42874d050a803f4b1cafcd608
--- /dev/null
+++ b/tools/perf/page_sets/tough_texture_upload_cases/texture_upload_experiment.js
@@ -0,0 +1,104 @@
+
+function SetupShaderProgram(gl) {
+  // Create Vertex Shader.
+  var vertex_shader = '' +
+    'attribute vec4 vPosition;\n' +
+    'attribute vec2 texCoord0;\n' +
+    'varying vec2 texCoord;\n' +
+    'void main() {\n' +
+    '    gl_Position = vPosition;\n' +
+    '    texCoord = texCoord0;\n' +
+    '}\n';
+  var vs = gl.createShader(gl.VERTEX_SHADER);
+  gl.shaderSource(vs, vertex_shader);
+  gl.compileShader(vs);
+
+  // Create Fragment Shader.
+  var fragment_shader = '' +
+    '#ifdef GL_ES\n' +
+    'precision mediump float;\n' +
+    '#endif\n' +
+    'uniform sampler2D tex;\n' +
+    'varying vec2 texCoord;\n' +
+    'void main() {\n' +
+    '    gl_FragData[0] = texture2D(tex, texCoord);\n' +
+    '}\n';
+  var fs = gl.createShader(gl.FRAGMENT_SHADER);
+  gl.shaderSource(fs, fragment_shader);
+  gl.compileShader(fs);
+
+  // Link Program.
+  var program = gl.createProgram();
+  gl.attachShader(program, vs);
+  gl.attachShader(program, fs);
+
+  gl.bindAttribLocation(program, 0, 'vPosition');
+  gl.bindAttribLocation(program, 1, 'texCoord0');
+  gl.linkProgram(program);
+
+  gl.deleteShader(fs);
+  gl.deleteShader(vs);
+  gl.useProgram(program);
+};
+
+function SetupQuad(gl) {
+  SetupShaderProgram(gl);
+
+  // Setup unit quad
+  var vertexObject = gl.createBuffer();
+  gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject);
+  gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([
+       1.0,  1.0, 0.0,
+      -1.0,  1.0, 0.0,
+      -1.0, -1.0, 0.0,
+       1.0,  1.0, 0.0,
+      -1.0, -1.0, 0.0,
+       1.0, -1.0, 0.0]), gl.STATIC_DRAW);
+  gl.enableVertexAttribArray(0);
+  gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0);
+
+  var vertexObject = gl.createBuffer();
+  gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject);
+  gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([
+      1.0, 1.0,
+      0.0, 1.0,
+      0.0, 0.0,
+      1.0, 1.0,
+      0.0, 0.0,
+      1.0, 0.0]), gl.STATIC_DRAW);
+  gl.enableVertexAttribArray(1);
+  gl.vertexAttribPointer(1, 2, gl.FLOAT, false, 0, 0);
+};
+
+function DoTextureUploadBenchmark(gl, dimension) {
+  SetupShaderProgram(gl);
+  SetupQuad(gl);
+
+  var canvasTexture = gl.createTexture();
+  gl.bindTexture(gl.TEXTURE_2D, canvasTexture);
+  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
+  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
+
+  var frame = 0;
+  var delta = 10;
+
+  function update_texture() {
+    requestAnimationFrame(update_texture);
+    var pixels = new Uint8Array(dimension * dimension * 4);
+    if (((frame + delta) < 0) || (frame + delta) >= 256 * 3)
+      delta *= -1;
+    frame += delta;
+
+    for (var i = 0; i < dimension * dimension; ++i) {
+      pixels[i*4] = Math.min(frame, 255);
+      pixels[i*4+1] = Math.max(256, Math.min(511, frame)) - 256;
+      pixels[i*4+2] = Math.max(512, frame) - 512;
+      pixels[i*4+3] = 0xFF;
+    }
+
+    gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, dimension, dimension, 0,
+                  gl.RGBA, gl.UNSIGNED_BYTE, pixels);
+    gl.drawArrays(gl.TRIANGLES, 0, 6);
+  }
+  update_texture();
+}