Update from https://crrev.com/320343

cc/output/geometry_binding.cc

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/output/geometry_binding.h"
 
 #include "cc/output/gl_renderer.h"  // For the GLC() macro.
 #include "gpu/command_buffer/client/gles2_interface.h"
 #include "ui/gfx/geometry/rect_f.h"
 
 namespace cc {
 
-GeometryBinding::GeometryBinding(gpu::gles2::GLES2Interface* gl,
-                                 const gfx::RectF& quad_vertex_rect)
-    : gl_(gl), quad_vertices_vbo_(0), quad_elements_vbo_(0) {
-  struct Vertex {
-    float a_position[3];
-    float a_texCoord[2];
-    // Index of the vertex, divide by 4 to have the matrix for this quad.
-    float a_index;
-  };
-  struct Quad {
-    Vertex v0, v1, v2, v3;
-  };
-  struct QuadIndex {
-    uint16 data[6];
-  };
+void SetupGLContext(gpu::gles2::GLES2Interface* gl,
+                    GLuint quad_elements_vbo,
+                    GLuint quad_vertices_vbo) {
+  GLC(gl, gl->BindBuffer(GL_ELEMENT_ARRAY_BUFFER, quad_elements_vbo));
 
-  static_assert(sizeof(Quad) == 24 * sizeof(float),
-                "struct Quad should be densely packed");
-  static_assert(sizeof(QuadIndex) == 6 * sizeof(uint16_t),
-                "struct QuadIndex should be densely packed");
-
-  Quad quad_list[8];
-  QuadIndex quad_index_list[8];
-  for (int i = 0; i < 8; i++) {
-    Vertex v0 = {{quad_vertex_rect.x(), quad_vertex_rect.bottom(), 0.0f, },
-                 {0.0f, 1.0f, }, i * 4.0f + 0.0f};
-    Vertex v1 = {{quad_vertex_rect.x(), quad_vertex_rect.y(), 0.0f, },
-                 {0.0f, 0.0f, }, i * 4.0f + 1.0f};
-    Vertex v2 = {{quad_vertex_rect.right(), quad_vertex_rect.y(), 0.0f, },
-                 {1.0f, .0f, }, i * 4.0f + 2.0f};
-    Vertex v3 = {{quad_vertex_rect.right(), quad_vertex_rect.bottom(), 0.0f, },
-                 {1.0f, 1.0f, }, i * 4.0f + 3.0f};
-    Quad x = {v0, v1, v2, v3};
-    quad_list[i] = x;
-    QuadIndex y = {
-        {static_cast<uint16>(0 + 4 * i), static_cast<uint16>(1 + 4 * i),
-         static_cast<uint16>(2 + 4 * i), static_cast<uint16>(3 + 4 * i),
-         static_cast<uint16>(0 + 4 * i), static_cast<uint16>(2 + 4 * i)}};
-    quad_index_list[i] = y;
-  }
-
-  gl_->GenBuffers(1, &quad_vertices_vbo_);
-  gl_->GenBuffers(1, &quad_elements_vbo_);
-  GLC(gl_, gl_->BindBuffer(GL_ARRAY_BUFFER, quad_vertices_vbo_));
-  GLC(gl_,
-      gl_->BufferData(
-          GL_ARRAY_BUFFER, sizeof(quad_list), quad_list, GL_STATIC_DRAW));
-  GLC(gl_, gl_->BindBuffer(GL_ELEMENT_ARRAY_BUFFER, quad_elements_vbo_));
-  GLC(gl_,
-      gl_->BufferData(GL_ELEMENT_ARRAY_BUFFER,
-                      sizeof(quad_index_list),
-                      quad_index_list,
-                      GL_STATIC_DRAW));
-}
-
-GeometryBinding::~GeometryBinding() {
-  gl_->DeleteBuffers(1, &quad_vertices_vbo_);
-  gl_->DeleteBuffers(1, &quad_elements_vbo_);
-}
-
-void GeometryBinding::PrepareForDraw() {
-  GLC(gl_, gl_->BindBuffer(GL_ELEMENT_ARRAY_BUFFER, quad_elements_vbo_));
-
-  GLC(gl_, gl_->BindBuffer(GL_ARRAY_BUFFER, quad_vertices_vbo_));
+  GLC(gl, gl->BindBuffer(GL_ARRAY_BUFFER, quad_vertices_vbo));
   // OpenGL defines the last parameter to VertexAttribPointer as type
   // "const GLvoid*" even though it is actually an offset into the buffer
   // object's data store and not a pointer to the client's address space.
   const void* offsets[3] = {
       0,
       reinterpret_cast<const void*>(3 * sizeof(float)),
       reinterpret_cast<const void*>(5 * sizeof(float)),
   };
 
-  GLC(gl_, gl_->VertexAttribPointer(PositionAttribLocation(), 3, GL_FLOAT,
-                                    false, 6 * sizeof(float), offsets[0]));
-  GLC(gl_, gl_->VertexAttribPointer(TexCoordAttribLocation(), 2, GL_FLOAT,
-                                    false, 6 * sizeof(float), offsets[1]));
-  GLC(gl_, gl_->VertexAttribPointer(TriangleIndexAttribLocation(), 1, GL_FLOAT,
-                                    false, 6 * sizeof(float), offsets[2]));
-  GLC(gl_, gl_->EnableVertexAttribArray(PositionAttribLocation()));
-  GLC(gl_, gl_->EnableVertexAttribArray(TexCoordAttribLocation()));
-  GLC(gl_, gl_->EnableVertexAttribArray(TriangleIndexAttribLocation()));
+  GLC(gl,
+      gl->VertexAttribPointer(GeometryBinding::PositionAttribLocation(), 3,
+                              GL_FLOAT, false, 6 * sizeof(float), offsets[0]));
+  GLC(gl,
+      gl->VertexAttribPointer(GeometryBinding::TexCoordAttribLocation(), 2,
+                              GL_FLOAT, false, 6 * sizeof(float), offsets[1]));
+  GLC(gl,
+      gl->VertexAttribPointer(GeometryBinding::TriangleIndexAttribLocation(), 1,
+                              GL_FLOAT, false, 6 * sizeof(float), offsets[2]));
+  GLC(gl,
+      gl->EnableVertexAttribArray(GeometryBinding::PositionAttribLocation()));
+  GLC(gl,
+      gl->EnableVertexAttribArray(GeometryBinding::TexCoordAttribLocation()));
+  GLC(gl, gl->EnableVertexAttribArray(
+              GeometryBinding::TriangleIndexAttribLocation()));
+}
+
+GeometryBindingQuad::GeometryBindingQuad() {
+  v0 = {{0, 0, 0}, {0, 0}, 0};
+  v1 = {{0, 0, 0}, {0, 0}, 0};
+  v2 = {{0, 0, 0}, {0, 0}, 0};
+  v3 = {{0, 0, 0}, {0, 0}, 0};
+}
+
+GeometryBindingQuad::GeometryBindingQuad(const GeometryBindingVertex& vert0,
+                                         const GeometryBindingVertex& vert1,
+                                         const GeometryBindingVertex& vert2,
+                                         const GeometryBindingVertex& vert3) {
+  v0 = vert0;
+  v1 = vert1;
+  v2 = vert2;
+  v3 = vert3;
+}
+
+GeometryBindingQuadIndex::GeometryBindingQuadIndex() {
+  memset(data, 0x0, sizeof(data));
+}
+
+GeometryBindingQuadIndex::GeometryBindingQuadIndex(uint16 index0,
+                                                   uint16 index1,
+                                                   uint16 index2,
+                                                   uint16 index3,
+                                                   uint16 index4,
+                                                   uint16 index5) {
+  data[0] = index0;
+  data[1] = index1;
+  data[2] = index2;
+  data[3] = index3;
+  data[4] = index4;
+  data[5] = index5;
 }
 
 }  // namespace cc