Update from https://crrev.com/316786

gpu/command_buffer/service/gles2_cmd_decoder_autogen.h

Index: gpu/command_buffer/service/gles2_cmd_decoder_autogen.h
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder_autogen.h b/gpu/command_buffer/service/gles2_cmd_decoder_autogen.h
index 720d54e339e7877895f31dc4468acf6adb41c53f..49fa8721e6c401fb6258c8fca37b3e63b783b627 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder_autogen.h
+++ b/gpu/command_buffer/service/gles2_cmd_decoder_autogen.h
@@ -2432,48 +2432,21 @@ error::Error GLES2DecoderImpl::HandleShaderSourceBucket(
   (void)c;
   GLuint shader = static_cast<GLuint>(c.shader);
 
-  const size_t kMinBucketSize = sizeof(GLint);
-  // Each string has at least |length| in the header and a NUL character.
-  const size_t kMinStringSize = sizeof(GLint) + 1;
   Bucket* bucket = GetBucket(c.str_bucket_id);
   if (!bucket) {
     return error::kInvalidArguments;
   }
-  const size_t bucket_size = bucket->size();
-  if (bucket_size < kMinBucketSize) {
-    return error::kInvalidArguments;
-  }
-  const char* bucket_data = bucket->GetDataAs<const char*>(0, bucket_size);
-  const GLint* header = reinterpret_cast<const GLint*>(bucket_data);
-  GLsizei count = static_cast<GLsizei>(header[0]);
-  if (count < 0) {
-    return error::kInvalidArguments;
-  }
-  const size_t max_count = (bucket_size - kMinBucketSize) / kMinStringSize;
-  if (max_count < static_cast<size_t>(count)) {
-    return error::kInvalidArguments;
-  }
-  const GLint* length = header + 1;
-  scoped_ptr<const char* []> strs;
-  if (count > 0)
-    strs.reset(new const char* [count]);
-  const char** str = strs.get();
-  base::CheckedNumeric<size_t> total_size = sizeof(GLint);
-  total_size *= count + 1;  // Header size.
-  if (!total_size.IsValid())
-    return error::kInvalidArguments;
-  for (GLsizei ii = 0; ii < count; ++ii) {
-    str[ii] = bucket_data + total_size.ValueOrDefault(0);
-    total_size += length[ii];
-    total_size += 1;  // NUL char at the end of each char array.
-    if (!total_size.IsValid() || total_size.ValueOrDefault(0) > bucket_size ||
-        str[ii][length[ii]] != 0) {
-      return error::kInvalidArguments;
-    }
-  }
-  if (total_size.ValueOrDefault(0) != bucket_size) {
+  GLsizei count = 0;
+  std::vector<char*> strs;
+  std::vector<GLint> len;
+  if (!bucket->GetAsStrings(&count, &strs, &len)) {
     return error::kInvalidArguments;
   }
+  const char** str =
+      strs.size() > 0 ? const_cast<const char**>(&strs[0]) : NULL;
+  const GLint* length =
+      len.size() > 0 ? const_cast<const GLint*>(&len[0]) : NULL;
+  (void)length;
   DoShaderSource(shader, count, str, length);
   return error::kNoError;
 }
@@ -2817,48 +2790,21 @@ error::Error GLES2DecoderImpl::HandleTransformFeedbackVaryingsBucket(
   (void)c;
   GLuint program = static_cast<GLuint>(c.program);
 
-  const size_t kMinBucketSize = sizeof(GLint);
-  // Each string has at least |length| in the header and a NUL character.
-  const size_t kMinStringSize = sizeof(GLint) + 1;
   Bucket* bucket = GetBucket(c.varyings_bucket_id);
   if (!bucket) {
     return error::kInvalidArguments;
   }
-  const size_t bucket_size = bucket->size();
-  if (bucket_size < kMinBucketSize) {
-    return error::kInvalidArguments;
-  }
-  const char* bucket_data = bucket->GetDataAs<const char*>(0, bucket_size);
-  const GLint* header = reinterpret_cast<const GLint*>(bucket_data);
-  GLsizei count = static_cast<GLsizei>(header[0]);
-  if (count < 0) {
-    return error::kInvalidArguments;
-  }
-  const size_t max_count = (bucket_size - kMinBucketSize) / kMinStringSize;
-  if (max_count < static_cast<size_t>(count)) {
-    return error::kInvalidArguments;
-  }
-  const GLint* length = header + 1;
-  scoped_ptr<const char* []> strs;
-  if (count > 0)
-    strs.reset(new const char* [count]);
-  const char** varyings = strs.get();
-  base::CheckedNumeric<size_t> total_size = sizeof(GLint);
-  total_size *= count + 1;  // Header size.
-  if (!total_size.IsValid())
-    return error::kInvalidArguments;
-  for (GLsizei ii = 0; ii < count; ++ii) {
-    varyings[ii] = bucket_data + total_size.ValueOrDefault(0);
-    total_size += length[ii];
-    total_size += 1;  // NUL char at the end of each char array.
-    if (!total_size.IsValid() || total_size.ValueOrDefault(0) > bucket_size ||
-        varyings[ii][length[ii]] != 0) {
-      return error::kInvalidArguments;
-    }
-  }
-  if (total_size.ValueOrDefault(0) != bucket_size) {
+  GLsizei count = 0;
+  std::vector<char*> strs;
+  std::vector<GLint> len;
+  if (!bucket->GetAsStrings(&count, &strs, &len)) {
     return error::kInvalidArguments;
   }
+  const char** varyings =
+      strs.size() > 0 ? const_cast<const char**>(&strs[0]) : NULL;
+  const GLint* length =
+      len.size() > 0 ? const_cast<const GLint*>(&len[0]) : NULL;
+  (void)length;
   GLenum buffermode = static_cast<GLenum>(c.buffermode);
   DoTransformFeedbackVaryings(program, count, varyings, buffermode);
   return error::kNoError;