Revert "Fixed compiler warning C4267 'conversion from 'size_t' to 'type', possible loss of data'"

Seems to have quite a few warnings in 64-bit on my machine.

BUG=angleproject:1120

This reverts commit c5cf9bc47d0ee028adbbf9e9f94ca567eec601dc.

Change-Id: I86768b900aeba52e7a2242d9ae8949f93f1a5ba9
Reviewed-on: https://chromium-review.googlesource.com/293280
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>
diff --git a/src/libANGLE/renderer/ProgramImpl.cpp b/src/libANGLE/renderer/ProgramImpl.cpp
index c861dfd..9da0c42 100644
--- a/src/libANGLE/renderer/ProgramImpl.cpp
+++ b/src/libANGLE/renderer/ProgramImpl.cpp
@@ -86,7 +86,7 @@
         return GL_INVALID_INDEX;
     }
 
-    unsigned int numUniforms = static_cast<unsigned int>(mUniforms.size());
+    unsigned int numUniforms = mUniforms.size();
     for (unsigned int index = 0; index < numUniforms; index++)
     {
         if (mUniforms[index]->name == baseName)
@@ -106,7 +106,7 @@
     size_t subscript = GL_INVALID_INDEX;
     std::string baseName = gl::ParseUniformName(name, &subscript);
 
-    unsigned int numUniformBlocks = static_cast<unsigned int>(mUniformBlocks.size());
+    unsigned int numUniformBlocks = mUniformBlocks.size();
     for (unsigned int blockIndex = 0; blockIndex < numUniformBlocks; blockIndex++)
     {
         const gl::UniformBlock &uniformBlock = *mUniformBlocks[blockIndex];