Use stdint types everywhere.

src/processor/stackwalker_x86.h

Index: src/processor/stackwalker_x86.h
===================================================================
--- a/src/processor/stackwalker_x86.h
+++ b/src/processor/stackwalker_x86.h
@@ -62,17 +62,17 @@ class StackwalkerX86 : public Stackwalke
   StackwalkerX86(const SystemInfo* system_info,
                  const MDRawContextX86* context,
                  MemoryRegion* memory,
                  const CodeModules* modules,
                  StackFrameSymbolizer* frame_symbolizer);
 
  private:
   // A STACK CFI-driven frame walker for the X86.
-  typedef SimpleCFIWalker<u_int32_t, MDRawContextX86> CFIWalker;
+  typedef SimpleCFIWalker<uint32_t, MDRawContextX86> CFIWalker;
 
   // Implementation of Stackwalker, using x86 context (%ebp, %esp, %eip) and
   // stack conventions (saved %ebp at [%ebp], saved %eip at 4[%ebp], or
   // alternate conventions as guided by any WindowsFrameInfo available for the
   // code in question.).
   virtual StackFrame* GetContextFrame();
   virtual StackFrame* GetCallerFrame(const CallStack* stack);