Fixing compiler warnings:

- Building Breakpad in Xcode with arm64 architecture.
 - iOS
Patches provided by: Ian Hickson and Greg Vance.

R=mark@chromium.org

Review URL: https://breakpad.appspot.com/1184003

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1286 4c0a9323-5329-0410-9bdc-e9ce6186880e

src/common/mac/file_id.cc

@@ -61,7 +61,7 @@ bool FileID::FileIdentifier(unsigned char identifier[16]) {
   unsigned char buffer[4096 * 2];
   size_t buffer_size = sizeof(buffer);
   while ((buffer_size = read(fd, buffer, buffer_size) > 0)) {
-    MD5Update(&md5, buffer, buffer_size);
+    MD5Update(&md5, buffer, static_cast<unsigned>(buffer_size));
   }
 
   close(fd);

src/common/mac/macho_id.cc

@@ -125,7 +125,7 @@ void MachoID::UpdateCRC(unsigned char *bytes, size_t size) {
 }
 
 void MachoID::UpdateMD5(unsigned char *bytes, size_t size) {
-  MD5Update(&md5_context_, bytes, size);
+  MD5Update(&md5_context_, bytes, static_cast<unsigned>(size));
 }
 
 void MachoID::Update(MachoWalker *walker, off_t offset, size_t size) {

src/common/memory.h

@@ -142,10 +142,10 @@ class PageAllocator {
     size_t num_pages;  // the number of pages in this set.
   };
 
-  const unsigned page_size_;
+  const size_t page_size_;
   PageHeader *last_;
   uint8_t *current_page_;
-  unsigned page_offset_;
+  size_t page_offset_;
 };
 
 // Wrapper to use with STL containers