Remove tools/clang (this will break things temporarily).

tools/clang/plugins/SuppressibleDiagnosticBuilder.h

-// Copyright 2015 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.
-
-#ifndef TOOLS_CLANG_PLUGINS_HESIENDIAGNOSTICBUILDER_H_
-#define TOOLS_CLANG_PLUGINS_HESIENDIAGNOSTICBUILDER_H_
-
-#include "clang/Basic/Diagnostic.h"
-#include "clang/Basic/SourceLocation.h"
-
-namespace chrome_checker {
-
-// A simple wrapper around DiagnosticBuilder that allows a diagnostic to be
-// suppressed. The intended use case is for helper functions that return a
-// DiagnosticBuilder, but only want to emit the diagnostic if some conditions
-// are met.
-class SuppressibleDiagnosticBuilder : public clang::DiagnosticBuilder {
- public:
-  SuppressibleDiagnosticBuilder(clang::DiagnosticsEngine* diagnostics,
-                                clang::SourceLocation loc,
-                                unsigned diagnostic_id,
-                                bool suppressed)
-      : DiagnosticBuilder(diagnostics->Report(loc, diagnostic_id)),
-        diagnostics_(diagnostics),
-        suppressed_(suppressed) {}
-
-  ~SuppressibleDiagnosticBuilder() {
-    if (suppressed_) {
-      // Clear the counts and underlying data, so the base class destructor
-      // doesn't try to emit the diagnostic.
-      FlushCounts();
-      Clear();
-      // Also clear the current diagnostic being processed by the
-      // DiagnosticsEngine, since it won't be emitted.
-      diagnostics_->Clear();
-    }
-  }
-
-  template <typename T>
-  friend const SuppressibleDiagnosticBuilder& operator<<(
-      const SuppressibleDiagnosticBuilder& builder,
-      const T& value) {
-    const DiagnosticBuilder& base_builder = builder;
-    base_builder << value;
-    return builder;
-  }
-
- private:
-  clang::DiagnosticsEngine* const diagnostics_;
-  const bool suppressed_;
-};
-
-}  // namespace chrome_checker
-
-#endif  // TOOLS_CLANG_PLUGINS_HESIENDIAGNOSTICBUILDER_H_