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diff --git a/externals/breakpad/src/common/mac/HTTPMultipartUpload.m b/externals/breakpad/src/common/mac/HTTPMultipartUpload.m
new file mode 100644
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+++ b/externals/breakpad/src/common/mac/HTTPMultipartUpload.m
@@ -0,0 +1,169 @@
+// Copyright 2006 Google LLC
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google LLC nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#import "HTTPMultipartUpload.h"
+
+#import "GTMDefines.h"
+#import "encoding_util.h"
+
+@interface HTTPMultipartUpload (PrivateMethods)
+- (NSString*)multipartBoundary;
+// Each of the following methods will append the starting multipart boundary,
+// but not the ending one.
+- (NSData*)formDataForKey:(NSString*)key value:(NSString*)value;
+- (NSData*)formDataForFileContents:(NSData*)contents name:(NSString*)name;
+- (NSData*)formDataForFile:(NSString*)file name:(NSString*)name;
+@end
+
+@implementation HTTPMultipartUpload
+//=============================================================================
+#pragma mark -
+#pragma mark || Private ||
+//=============================================================================
+- (NSString*)multipartBoundary {
+  // The boundary has 27 '-' characters followed by 16 hex digits
+  return [NSString
+      stringWithFormat:@"---------------------------%08X%08X", rand(), rand()];
+}
+
+//=============================================================================
+- (NSData*)formDataForKey:(NSString*)key value:(NSString*)value {
+  NSMutableData* data = [NSMutableData data];
+  [self appendBoundaryData:data];
+
+  NSString* escaped = PercentEncodeNSString(key);
+  NSString* fmt = @"Content-Disposition: form-data; name=\"%@\"\r\n\r\n%@\r\n";
+  NSString *form = [NSString stringWithFormat:fmt, escaped, value];
+
+  [data appendData:[form dataUsingEncoding:NSUTF8StringEncoding]];
+  return data;
+}
+
+//=============================================================================
+- (void)appendBoundaryData:(NSMutableData*)data {
+  NSString* fmt = @"--%@\r\n";
+  NSString* pre = [NSString stringWithFormat:fmt, boundary_];
+
+  [data appendData:[pre dataUsingEncoding:NSUTF8StringEncoding]];
+}
+
+//=============================================================================
+#pragma mark -
+#pragma mark || Public ||
+//=============================================================================
+- (id)initWithURL:(NSURL*)url {
+  if ((self = [super initWithURL:url])) {
+    boundary_ = [[self multipartBoundary] retain];
+    files_ = [[NSMutableDictionary alloc] init];
+  }
+
+  return self;
+}
+
+//=============================================================================
+- (void)dealloc {
+  [parameters_ release];
+  [files_ release];
+  [boundary_ release];
+
+  [super dealloc];
+}
+
+//=============================================================================
+- (void)setParameters:(NSDictionary*)parameters {
+  if (parameters != parameters_) {
+    [parameters_ release];
+    parameters_ = [parameters copy];
+  }
+}
+
+//=============================================================================
+- (NSDictionary*)parameters {
+  return parameters_;
+}
+
+//=============================================================================
+- (void)addFileAtPath:(NSString*)path name:(NSString*)name {
+  [files_ setObject:path forKey:name];
+}
+
+//=============================================================================
+- (void)addFileContents:(NSData*)data name:(NSString*)name {
+  [files_ setObject:data forKey:name];
+}
+
+//=============================================================================
+- (NSDictionary*)files {
+  return files_;
+}
+
+//=============================================================================
+- (NSString*)HTTPMethod {
+  return @"POST";
+}
+
+//=============================================================================
+- (NSString*)contentType {
+  return [NSString
+      stringWithFormat:@"multipart/form-data; boundary=%@", boundary_];
+}
+
+//=============================================================================
+- (NSData*)bodyData {
+  NSMutableData* postBody = [NSMutableData data];
+
+  // Add any parameters to the message
+  NSArray* parameterKeys = [parameters_ allKeys];
+  NSString* key;
+
+  NSInteger count = [parameterKeys count];
+  for (NSInteger i = 0; i < count; ++i) {
+    key = [parameterKeys objectAtIndex:i];
+    [postBody appendData:[self formDataForKey:key
+                                        value:[parameters_ objectForKey:key]]];
+  }
+
+  // Add any files to the message
+  NSArray* fileNames = [files_ allKeys];
+  for (NSString* name in fileNames) {
+    // First append boundary
+    [self appendBoundaryData:postBody];
+    // Then the formdata
+    id fileOrData = [files_ objectForKey:name];
+    [HTTPRequest appendFileToBodyData:postBody
+                             withName:name
+                       withFileOrData:fileOrData];
+  }
+
+  NSString* epilogue = [NSString stringWithFormat:@"\r\n--%@--\r\n", boundary_];
+  [postBody appendData:[epilogue dataUsingEncoding:NSUTF8StringEncoding]];
+
+  return postBody;
+}
+
+@end