Use base::TimeDelta in chrome_pdf::Timer.

Change-Id: Ib087b7ea70bae6bad8c7512cdc7f6c5d84b58661
Reviewed-on: https://chromium-review.googlesource.com/809292Reviewed-by: dsinclair <dsinclair@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#521873}

pdf/timer.cc

@@ -9,8 +9,7 @@
 
 namespace chrome_pdf {
 
-Timer::Timer(int delay_in_milliseconds)
-    : delay_(delay_in_milliseconds), callback_factory_(this) {
+Timer::Timer(base::TimeDelta delay) : delay_(delay), callback_factory_(this) {
   PostCallback();
 }
 
@@ -19,7 +18,8 @@ Timer::~Timer() = default;
 void Timer::PostCallback() {
   pp::CompletionCallback callback =
       callback_factory_.NewCallback(&Timer::TimerProc);
-  pp::Module::Get()->core()->CallOnMainThread(delay_, callback, 0);
+  pp::Module::Get()->core()->CallOnMainThread(delay_.InMilliseconds(), callback,
+                                              0);
 }
 
 void Timer::TimerProc(int32_t /*result*/) {

pdf/timer.h

@@ -6,6 +6,7 @@
 #define PDF_TIMER_H_
 
 #include "base/macros.h"
+#include "base/time/time.h"
 #include "ppapi/utility/completion_callback_factory.h"
 
 namespace chrome_pdf {
@@ -15,7 +16,7 @@ namespace chrome_pdf {
 // base::MessageLoop, on which it is based.
 class Timer {
  public:
-  explicit Timer(int delay_in_milliseconds);
+  explicit Timer(base::TimeDelta delay);
   virtual ~Timer();
 
   virtual void OnTimer() = 0;
@@ -24,7 +25,7 @@ class Timer {
   void PostCallback();
   void TimerProc(int32_t result);
 
-  int delay_;
+  const base::TimeDelta delay_;
   pp::CompletionCallbackFactory<Timer> callback_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Timer);

pdf/url_loader_wrapper_impl.cc

@@ -19,8 +19,9 @@
 namespace chrome_pdf {
 
 namespace {
+
 // We should read with delay to prevent block UI thread, and reduce CPU usage.
-const int kReadDelayMs = 2;
+constexpr base::TimeDelta kReadDelayMs = base::TimeDelta::FromMilliseconds(2);
 
 pp::URLRequestInfo MakeRangeRequest(pp::Instance* plugin_instance,
                                     const std::string& url,