Make VEA test support videos with different coded size and visible size

base/files/memory_mapped_file.h

Index: base/files/memory_mapped_file.h
diff --git a/base/files/memory_mapped_file.h b/base/files/memory_mapped_file.h
index 8a7f045f351a0365d496f37f5824607cacfdc12e..6d56e1583bd5330852910a992ac016e944f6e6a4 100644
--- a/base/files/memory_mapped_file.h
+++ b/base/files/memory_mapped_file.h
@@ -58,6 +58,14 @@ class BASE_EXPORT MemoryMappedFile {
   // As above, but works with a region of an already-opened file.
   bool Initialize(File file, const Region& region);
 
+  // As above, works with an already-opened file and enables write permission
+  // when |write| is true.
+  bool Initialize(File file, bool write);
+
+  // As above, but works with a region of an already-opened file and enables
+  // write permission when |write| is true.
+  bool Initialize(File file, const Region& region, bool write);

[wuchengli, 2014/08/28 10:17:48]

I think this can be added in the future when someone actually uses it.

+
 #if defined(OS_WIN)
   // Opens an existing file and maps it as an image section. Please refer to
   // the Initialize function above for additional information.
@@ -85,7 +93,8 @@ class BASE_EXPORT MemoryMappedFile {
 
   // Map the file to memory, set data_ to that memory address. Return true on
   // success, false on any kind of failure. This is a helper for Initialize().
-  bool MapFileRegionToMemory(const Region& region);
+  // - |write| is used to enable write permission of mmap or not.

[wuchengli, 2014/08/28 10:17:48]

s/or not//

+  bool MapFileRegionToMemory(const Region& region, bool write);
 
   // Closes all open handles.
   void CloseHandles();