Switch to standard integer types in chrome/browser/, part 1 of 4.

chrome/browser/android/history_report/usage_reports_buffer_backend.h

Index: chrome/browser/android/history_report/usage_reports_buffer_backend.h
diff --git a/chrome/browser/android/history_report/usage_reports_buffer_backend.h b/chrome/browser/android/history_report/usage_reports_buffer_backend.h
index 3a46ed28792e153952807d32e27fcfd580264997..3c275a15f2e8d091acbd16cc42a7c4faa5ffd507 100644
--- a/chrome/browser/android/history_report/usage_reports_buffer_backend.h
+++ b/chrome/browser/android/history_report/usage_reports_buffer_backend.h
@@ -5,10 +5,13 @@
 #ifndef CHROME_BROWSER_ANDROID_HISTORY_REPORT_USAGE_REPORTS_BUFFER_BACKEND_H_
 #define CHROME_BROWSER_ANDROID_HISTORY_REPORT_USAGE_REPORTS_BUFFER_BACKEND_H_
 
+#include <stdint.h>
+
 #include <string>
 #include <vector>
 
 #include "base/files/file_path.h"
+#include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 
 namespace base {
@@ -33,7 +36,7 @@ class UsageReportsBufferBackend {
   // Creates and initializes the internal data structures.
   bool Init();
 
-  void AddVisit(const std::string& id, int64 timestamp_ms, bool typed_visit);
+  void AddVisit(const std::string& id, int64_t timestamp_ms, bool typed_visit);
 
   // Returns a set of up to |amount| usage reports.
   scoped_ptr<std::vector<UsageReport> > GetUsageReportsBatch(int amount);