Fix cpplint errors in cc/(animation|input|layers|trees|test)/

cc/scheduler/scheduler_state_machine_unittest.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/scheduler/scheduler_state_machine.h"
 
 #include "cc/scheduler/scheduler.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace cc {
 
 namespace {
 
 const SchedulerStateMachine::CommitState all_commit_states[] = {
   SchedulerStateMachine::COMMIT_STATE_IDLE,
   SchedulerStateMachine::COMMIT_STATE_FRAME_IN_PROGRESS,
   SchedulerStateMachine::COMMIT_STATE_READY_TO_COMMIT,
   SchedulerStateMachine::COMMIT_STATE_WAITING_FOR_FIRST_DRAW
 };
 
 // Exposes the protected state fields of the SchedulerStateMachine for testing
 class StateMachine : public SchedulerStateMachine {
  public:
-  StateMachine(const SchedulerSettings& scheduler_settings)
+  explicit StateMachine(const SchedulerSettings& scheduler_settings)
       : SchedulerStateMachine(scheduler_settings) {}
   void SetCommitState(CommitState cs) { commit_state_ = cs; }
   CommitState CommitState() const { return commit_state_; }
 
   bool NeedsCommit() const { return needs_commit_; }
 
   void SetNeedsRedraw(bool b) { needs_redraw_ = b; }
   bool NeedsRedraw() const { return needs_redraw_; }
 
   void SetNeedsForcedRedraw(bool b) { needs_forced_redraw_ = b; }
@@ skipping 1037 matching lines @@
   EXPECT_EQ(SchedulerStateMachine::ACTION_NONE, state.NextAction());
   state.SetNeedsForcedRedraw(true);
   EXPECT_EQ(SchedulerStateMachine::ACTION_DRAW_FORCED, state.NextAction());
   state.UpdateState(state.NextAction());
   state.DidDrawIfPossibleCompleted(true);
   state.DidLeaveVSync();
 }
 
 }  // namespace
 }  // namespace cc