Update common/chromium/build_gn.patch

https://chromium-review.googlesource.com/797939
https://chromium-review.googlesource.com/779624

patches/common/chromium/build_gn.patch

@@ -62,23 +62,6 @@ index 5e1f7fcc4d83..15723e6b7184 100644
      # Component mode: dynamic CRT. Since the library is shared, it requires
      # exceptions or will give errors about things not matching, so keep
      # exceptions on.
-diff --git a/build/secondary/third_party/crashpad/crashpad/handler/BUILD.gn b/build/secondary/third_party/crashpad/crashpad/handler/BUILD.gn
-index 4d385dd5512b..b747197f03d9 100644
---- a/build/secondary/third_party/crashpad/crashpad/handler/BUILD.gn
-+++ b/build/secondary/third_party/crashpad/crashpad/handler/BUILD.gn
-@@ -54,9 +54,11 @@ executable("crashpad_handler") {
-   if (is_mac && is_component_build) {
-     # The handler is in Chromium.app/Contents/Versions/X/Chromium Framework.framework/Versions/A/Helpers/
-     # so set rpath up to the base.
-+    # In Electron, the handler is in Electron.app/Contents/Resources/Electron Framework.framework/Versions/A/Resources/
-+    # which is one less level of nesting.
-     ldflags = [
-       "-rpath",
--      "@loader_path/../../../../../../../..",
-+      "@loader_path/../../../../../../..",
-     ]
-   }
- 
 diff --git a/third_party/WebKit/Source/platform/BUILD.gn b/third_party/WebKit/Source/platform/BUILD.gn
 index 6c86a6454256..2bc8c31396af 100644
 --- a/third_party/WebKit/Source/platform/BUILD.gn
@@ -91,19 +74,6 @@ index 6c86a6454256..2bc8c31396af 100644
    sources = [
      "text/CharacterPropertyDataGenerator.cpp",
      "text/CharacterPropertyDataGenerator.h",
-diff --git a/third_party/widevine/cdm/BUILD.gn b/third_party/widevine/cdm/BUILD.gn
-index 9e744b9940e2..09208f2e98fa 100644
---- a/third_party/widevine/cdm/BUILD.gn
-+++ b/third_party/widevine/cdm/BUILD.gn
-@@ -110,7 +110,7 @@ if (widevine_cdm_binary_files != []) {
-       "//build/config:exe_and_shlib_deps",
-     ]
- 
--    if (is_mac) {
-+    if (is_mac && !is_electron_build) {
-       ldflags = [
-         # Not to strip important symbols by -Wl,-dead_strip.
-         "-Wl,-exported_symbol,_PPP_GetInterface",
 diff --git a/.gn b/.gn
 index 9e744b9940e2..09208f2e98fa 100644
 --- a/.gn