Fix some grammar in content/common and content/public

content/common/sandbox_mac.mm

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/common/sandbox_mac.h"
 
 #import <Cocoa/Cocoa.h>
 
 extern "C" {
 #include <sandbox.h>
@@ skipping 264 matching lines @@
      gfx::GLSurface::InitializeOneOff();
   }
 }
 
 // static
 NSString* Sandbox::BuildAllowDirectoryAccessSandboxString(
     const FilePath& allowed_dir,
     SandboxVariableSubstitions* substitutions) {
   // A whitelist is used to determine which directories can be statted
   // This means that in the case of an /a/b/c/d/ directory, we may be able to
-  // stat the leaf directory, but not it's parent.
+  // stat the leaf directory, but not its parent.
   // The extension code in Chrome calls realpath() which fails if it can't call
   // stat() on one of the parent directories in the path.
   // The solution to this is to allow statting the parent directories themselves
   // but not their contents.  We need to add a separate rule for each parent
   // directory.
 
   // The sandbox only understands "real" paths.  This resolving step is
   // needed so the caller doesn't need to worry about things like /var
   // being a link to /private/var (like in the paths CreateNewTempDirectory()
   // returns).
@@ skipping 21 matching lines @@
       return nil;
     }
 
     NSString* subdir_escaped_ns =
         base::SysUTF8ToNSString(subdir_escaped.c_str());
     sandbox_command =
         [sandbox_command stringByAppendingFormat:@"(literal \"%@\")",
             subdir_escaped_ns];
   }
 
-  // Finally append the leaf directory.  Unlike it's parents (for which only
+  // Finally append the leaf directory.  Unlike its parents (for which only
   // stat() should be allowed), the leaf directory needs full access.
   (*substitutions)["ALLOWED_DIR"] =
       SandboxSubstring(allowed_dir_canonical.value(),
                        SandboxSubstring::REGEX);
   sandbox_command =
       [sandbox_command
           stringByAppendingString:@") (allow file-read* file-write*"
                                    " (regex #\"@ALLOWED_DIR@\") )"];
   return sandbox_command;
 }
@@ skipping 237 matching lines @@
   if (HANDLE_EINTR(fcntl(fd, F_GETPATH, canonical_path)) != 0) {
     DPLOG(FATAL) << "GetCanonicalSandboxPath() failed for: "
                  << path->value();
     return;
   }
 
   *path = FilePath(canonical_path);
 }
 
 }  // namespace sandbox