Add missing break in switch-case statements in gles2_cmd_decoder

gpu/command_buffer/service/gles2_cmd_decoder_unittest_framebuffers.cc

 // Copyright 2014 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 "gpu/command_buffer/service/gles2_cmd_decoder.h"
 
 #include "base/command_line.h"
 #include "base/strings/string_number_conversions.h"
 #include "gpu/command_buffer/common/gles2_cmd_format.h"
 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
@@ skipping 2497 matching lines @@
       .RetiresOnSaturation();
   DiscardFramebufferEXTImmediate& cmd =
       *GetImmediateAs<DiscardFramebufferEXTImmediate>();
   cmd.Init(target, count, attachments);
 
   EXPECT_EQ(error::kNoError, ExecuteImmediateCmd(cmd, sizeof(attachments)));
   EXPECT_EQ(GL_NO_ERROR, GetGLError());
   EXPECT_FALSE(framebuffer->IsCleared());
 }
 
+TEST_P(GLES2DecoderManualInitTest, ClearBackbufferBitsOnDiscardFramebufferEXT) {
+  InitState init;
+  init.extensions = "GL_EXT_discard_framebuffer";
+  init.gl_version = "opengl es 2.0";
+  InitDecoder(init);
+
+  // EXPECT_EQ can't be used to compare function pointers.
+  EXPECT_TRUE(
+      gfx::MockGLInterface::GetGLProcAddress("glDiscardFramebufferEXT") ==
+      gfx::g_driver_gl.fn.glDiscardFramebufferEXTFn);
+
+  const GLenum target = GL_FRAMEBUFFER;
+  const GLsizei count = 1;
+  GLenum attachments[] = {GL_COLOR_EXT};
+
+  EXPECT_CALL(*gl_, DiscardFramebufferEXT(target, count, _))
+      .Times(1)
+      .RetiresOnSaturation();
+  DiscardFramebufferEXTImmediate& cmd =
+      *GetImmediateAs<DiscardFramebufferEXTImmediate>();
+  cmd.Init(target, count, attachments);
+  EXPECT_EQ(error::kNoError, ExecuteImmediateCmd(cmd, sizeof(attachments)));
+  EXPECT_EQ(GL_NO_ERROR, GetGLError());
+  EXPECT_EQ(static_cast<uint32_t>(GL_COLOR_BUFFER_BIT),
+            GetAndClearBackbufferClearBitsForTest());
+
+  attachments[0] = GL_DEPTH_EXT;
+  EXPECT_CALL(*gl_, DiscardFramebufferEXT(target, count, _))
+      .Times(1)
+      .RetiresOnSaturation();
+  cmd.Init(target, count, attachments);
+  EXPECT_EQ(error::kNoError, ExecuteImmediateCmd(cmd, sizeof(attachments)));
+  EXPECT_EQ(GL_NO_ERROR, GetGLError());
+  EXPECT_EQ(static_cast<uint32_t>(GL_DEPTH_BUFFER_BIT),
+            GetAndClearBackbufferClearBitsForTest());
+
+  attachments[0] = GL_STENCIL_EXT;
+  EXPECT_CALL(*gl_, DiscardFramebufferEXT(target, count, _))
+      .Times(1)
+      .RetiresOnSaturation();
+  cmd.Init(target, count, attachments);
+  EXPECT_EQ(error::kNoError, ExecuteImmediateCmd(cmd, sizeof(attachments)));
+  EXPECT_EQ(GL_NO_ERROR, GetGLError());
+  EXPECT_EQ(static_cast<uint32_t>(GL_STENCIL_BUFFER_BIT),
+            GetAndClearBackbufferClearBitsForTest());
+
+  const GLsizei count0 = 3;
+  const GLenum attachments0[] = {GL_COLOR_EXT, GL_DEPTH_EXT, GL_STENCIL_EXT};
+  EXPECT_CALL(*gl_, DiscardFramebufferEXT(target, count0, _))
+      .Times(1)
+      .RetiresOnSaturation();
+  cmd.Init(target, count0, attachments0);
+  EXPECT_EQ(error::kNoError, ExecuteImmediateCmd(cmd, sizeof(attachments0)));
+  EXPECT_EQ(GL_NO_ERROR, GetGLError());
+  EXPECT_EQ(static_cast<uint32_t>(GL_COLOR_BUFFER_BIT |
+                                  GL_DEPTH_BUFFER_BIT |
+                                  GL_STENCIL_BUFFER_BIT),
+            GetAndClearBackbufferClearBitsForTest());
+}
+
 TEST_P(GLES2DecoderTest, DiscardFramebufferEXTUnsupported) {
   const GLenum target = GL_FRAMEBUFFER;
   const GLsizei count = 1;
   const GLenum attachments[] = {GL_COLOR_EXT};
   DiscardFramebufferEXTImmediate& cmd =
       *GetImmediateAs<DiscardFramebufferEXTImmediate>();
   cmd.Init(target, count, attachments);
 
   // Should not result into a call into GL.
   EXPECT_EQ(error::kUnknownCommand,
@@ skipping 208 matching lines @@
   EXPECT_EQ(1, result->GetNumResults());
   EXPECT_EQ(GL_NO_ERROR, GetGLError());
 }
 
 // TODO(gman): PixelStorei
 
 // TODO(gman): SwapBuffers
 
 }  // namespace gles2
 }  // namespace gpu