chore: bump chromium to 7d4ac110045b7647fa8a81f5f0709 (master) (#24970)

* chore: bump chromium in DEPS to 760c905ccca34d8ed83c54f6a42c42a375792a6b

* chore: update patches

- Introduce WebContentsObserverList to encapsulate common behaviour
  2343269
- DumpAccTree mac testing: refactor tree formatter logic to make it
suitable for nested attribute calls
  2274545
- Fix FontPlatformDataMacTest.VariableOpticalSizingThreshold for Big Sur
  2351299

* chore: bump chromium in DEPS to b04584161e07d4ac110045b7647fa8a81f5f0709

* chore: update patches

* [printing] Move printing::MarginType to //printing/mojom/print.mojom

2341222

Co-authored-by: deepak1556 <hop2deep@gmail.com>

patches/v8/add_realloc.patch

@@ -12,10 +12,10 @@ when we override ReallocateBufferMemory, so we therefore need to implement
 Realloc on the v8 side.
 
 diff --git a/include/v8.h b/include/v8.h
-index f0f6472ba38595a08e98a345723f4fc80928948f..1343788434a4e735088219ec3808fd2ea5122996 100644
+index 263e7da8f1ff5136382867aaebe4bc138afa0a49..913bea674bf076df2a9946752d0eacfa93bda6bf 100644
 --- a/include/v8.h
 +++ b/include/v8.h
-@@ -5097,6 +5097,13 @@ class V8_EXPORT ArrayBuffer : public Object {
+@@ -5096,6 +5096,13 @@ class V8_EXPORT ArrayBuffer : public Object {
       */
      virtual void* AllocateUninitialized(size_t length) = 0;
  
@@ -30,7 +30,7 @@ index f0f6472ba38595a08e98a345723f4fc80928948f..1343788434a4e735088219ec3808fd2e
       * Free the memory block of size |length|, pointed to by |data|.
       * That memory is guaranteed to be previously allocated by |Allocate|.
 diff --git a/src/api/api.cc b/src/api/api.cc
-index 581259f04c86fde41cac7f4c109ccbf8383493ef..852a1d4bc353e75e7a453e8fa01c4d38483a6aee 100644
+index 5b5985fe4adfabbdc8629ff5e9a28f0fb6e706b4..acb9b0ed3dfbb5286a9990ffaa7197045ea692fe 100644
 --- a/src/api/api.cc
 +++ b/src/api/api.cc
 @@ -536,6 +536,10 @@ void V8::SetSnapshotDataBlob(StartupData* snapshot_blob) {